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Prevention and Surveillance branch


    HCE Prevention Lead

  • Dr. Kathy Gates joined the Hearing Center of Excellence as a contractor in October 2012. Her primary area of focus within the HCE is to promote hearing loss prevention initiatives. She is currently working on the Comprehensive Hearing Health Program and Campaign.

    Dr. Gates’ passion for hearing loss prevention began in 1987 when she was commissioned in the U.S. Army Medical Service Corps to serve as an Army Audiologist. Dr. Gates served over twenty-six years in the U.S. Army and her last assignment was Integrated Service Chief, Audiology and Speech Center, Walter Reed National Military Medical Center. During this tour she also served as the Audiology Consultant for the Army Surgeon General from July 2005 to July 2010.

    Robert WIlliams


  • Mr. Robert Williams is an Engineer in the Prevention Branch of the Hearing Center of Excellence.  He is assigned to Program Executive Office Soldier, where he provides expertise in acoustics to the Tactical Communication and Protective System program and other hearing protection programs.  He earned a Bachelor of Science in Mechanical Engineering from the University of Alabama in 2006, and a Master of Engineering in Acoustics from the Pennsylvania State University in 2009.  Prior to joining the Hearing Center of Excellence, Mr. Williams was a research engineer at the US Army Aeromedical Research Laboratory, where he specialized in acoustic measurements and hearing protector testing.

Clinical Care, Rehabilitation, and Restoration Branch

  • Amy Boudin, AuD, CCC-A 

    Clinical Audiologist

    Dr. Amy Boudin-George is a Clinical Audiologist for the Hearing Center of Excellence in the Clinical Care, Rehabilitation, and Restoration Branch. Dr. Boudin-George is currently leading HCE efforts in audiology clinical coding standardization, continuing education programs and products, and the development of easily accessible clinical tools for ototoxicity monitoring. She provides support and clinical expertise in other HCE activities, including the use and improvement of the Enterprise Clinical Audiology Application and CarePoint. Dr. Boudin-George also serves as a clinical provider for patients with, or who are considering, implantable devices in the Audiology Clinic at the San Antonio Military Medical Center.

    Dr. Boudin-George received her doctorate of audiology in 2010 from Louisiana State University Health Sciences Center. Prior to joining the HCE, she spent five years as a diagnostic and rehabilitative audiologist at a neurotology clinic in Albuquerque, New Mexico; ancillary duties included lecturing for the University of New Mexico graduate speech pathology program and providing screening services for semi-annual rural cleft palate clinics in Gallup, New Mexico.

  • Andrew J. Fallon AuD, ABA

    Clinical Audiologist

    Dr. Andrew Fallon is a Clinical Audiologist for the Department of Defense Hearing Center of Excellence. Dr. Fallon serves as a subject matter expert, both leading and providing support for HCE research and clinical endeavors using his background knowledge in information technology.  Projects currently underway include facilitating the use of online learning management systems, standardization of clinical coding, migration and merging of legacy and current day patient information data bases and the systematic evaluation and implementation of next-generation clinical testing software.

     Dr. Fallon earned his Doctorate in Audiology from the University of Florida at Gainesville. His undergraduate degree, a Bachelor's of Science, in Communications Disorder is from Stockton University and his Masters of  Science, in Audiology is from Lamar University.

     Prior to coming to work for the DoD, Dr. Fallon has served previously as both a Clinical Audiologist with extensive experience in diagnostic studies and exams and as a program director for an adult cochlear implant  program.  He has also held the position as Northeast Regional representative for MED-EL cochlear 

  • Karen H Lambert PT, DPT, NCS

    Vestibular Program Manager

    Karen H. Lambert currently serves as the Vestibular Program Manager for the Defense Hearing Center of Excellence and provides clinical care at a private outpatient physical therapy clinic specializing in treatment of patients with vestibular and balance dysfunction. She earned a Master of Physical Therapy from MCP Hahnemann University in 2000 and later her Doctorate of Physical Therapy from Drexel University in 2014. She received Board Certification in the area of Neurologic Physical Therapy from the American Physical Therapy Board of Clinical Specialties in 2006 with re-certification in 2016. She has served on multiple task forces for the Neurology Section of the American Physical Therapy Association related to vestibular dysfunction. She served as the Officer in Charge of the Traumatic Brain Injury Section of Physical Therapy at Walter Reed Army Medical Center from December 2007-August 2010 where she participated in research aimed at investigating the most effective rehabilitative techniques for service members with complaints of dizziness and/or cognitive impairment post mild to moderate traumatic brain injury.

Research Coordination Branch 

  • Kia Brooks

    National Capital Region Research Coordinator/Administrator

    Ms. Kia Brooks is the contract National Capital Region Research Coordinator/Administrator for the Defense Hearing Center of Excellence at Walter Reed National Military Medical Center in the Audiology and Speech Pathology Center (ASPC). Ms. Brooks oversees research activities for the ASPC including, but not limited to, tracking projects, protocol implementation, assisting with collaborative efforts, marketing, grant proposal submission assistance, research portfolio management, and regulatory oversight.

    Ms. Brooks received her Bachelor of Science in Neurobiology and Physiology from the University of Maryland. After transitioning from the laboratory as a Molecular Biologist, Ms. Brooks moved to New York City where she spent nine years managing research projects. She is currently seeking a Master of Science degree in Clinical Trial Sciences at Rutgers University.

  • Kari Buchanan, MA, MPH

    Program Manager

    Ms. Kari Buchanan is the contract Program Manager for Auditory Fitness for Duty for the Defense Hearing Center of Excellence and liaison to the Office of Naval Research Noise-Induced Hearing Loss Program. In this position, Ms. Buchanan manages the programs and projects supporting the Auditory Fitness for Duty work stream, including coordinating the AFFD Working Group and efforts to develop a standard assessment method for auditory situation awareness factors with hearing protective devices, conducting research related to AFFD, and working with DoD and service representatives.

    Ms. Buchanan is a retired Navy Industrial Hygiene Officer with 20 years of active duty military experience. During her varied career, Ms. Buchanan served aboard two hospitals, a submarine tender, and an aircraft carrier, and with a Marine Wing, and an environmental and preventive medicine unit. She was a staff officer on the Chief of Naval Operations staff and the Navy Warfare Development Command. In addition, she was the first Navy Medical Service Corps fellow concentrating on chemical, biological, and radiological defense. She has a Bachelor’s of Science in Medical Technology from the University of Connecticut, a Masters of Public Health in Environmental Health Sciences from Columbia University, and a Masters of Art in National Security and Strategy from the Naval War College.

  • Elsa Camou, MPH

    Regional Research Coordinator

    Ms. Elsa Camou currently serves as a contract Regional Research Administrator for the Defense Hearing Center of Excellence at Lackland Air Force Base, Texas. In this position, Ms. Camou supports grantsmanship activities, quality and process improvement initiatives, proper implementation of research-related operating policies and procedures, and coordination of research protocols and outreach activities.

    Ms. Camou began her military research support career in 2007 as a Behavioral Research Assistant at the 711th Human Performance Wing at Brooks Air Force Base, Texas. In 2009, Ms. Camou became a Project Director at Brooke Army Medical Center, in the Center for Nursing Science and Clinical Research. During her time at BAMC, Ms. Camou worked on a variety of research studies ranging from nanotechnology to smoking cessation. After completing a Master’s in Public Health in 2012 at the University of the Texas School of Public Health San Antonio Regional Campus, Ms. Camou became a Regional Research Administrator at HCE.

  • Kathryn E. Marshall, PHD

    Pacific Northwest Regional Clinical Research Coordinator/Administrator

    Dr. Kathryn Marshall is the contract Pacific Northwest Regional Clinical Research Coordinator/Administrator for the Defense Hearing Center of Excellence positioned at Joint Base Lewis-McChord, Madigan Army Medical Center in Tacoma, Washington. In this position, Dr. Marshall serves as the point of contact for HCE to implement research objectives out to the Pacific Northwest research facilities. In addition, she heads the research program for the ENT and Audiology clinic at MAMC where she manages the pre- and post-award administration for sponsored programs and internal DoD projects.

    In 2009, Dr. Marshall completed her PhD in the Cell Biology, Neurobiology, and Anatomy at the Medical College of Wisconsin specializing in Developmental and Molecular Biology. She went on to complete her post-doctoral fellowship with the Department of Energy at Pacific Northwest National Laboratory where she specialized in developing biosensors to detect explosives in marine environments. With her strong background in biomedical research, Dr. Marshall aids in advancing the research objectives at MAMC and the Pacific Northwest region.

  • Sara Murphy, MPH

    Pacific Southwest Regional Clinical Research Coordinator/Administrator

    Mrs. Sara Murphy serves as a contract Regional Research Coordinator/Administrator for the Defense Hearing Center of Excellence.  Mrs. Murphy facilitates auditory and vestibular research collaborations in the Pacific Southwest, including grantsmanship activities, protocol development, and study oversight. She oversees a robust clinical research program at Naval Medical Center San Diego, as well as facilitating research in the region.

    With a Bachelor of Arts degree in psychology from the University of San Diego, Mrs. Murphy began her research career with Veteran’s Medical Research Foundation. There she served as a Research Associate on a prospective study examining the psychological, social, and genetic factors related to alcohol dependence. In 2009, she took on the position of Project Coordinator for a related collaborative study investigating the genetics of alcoholism.

    After completing a Master of Public Health with a focus in Health Promotion from San Diego State University in 2010, Mrs. Murphy transitioned into the private sector as a Clinical Research Coordinator of pharmaceutical interventions for a wide variety of central nervous system disorders. In 2012, Mrs. Murphy assumed the position of Research Administrator for HCE.

  • Greg Schmidt, CMSGT (RET)

    Senior Program Manager, PMP

Mr. Greg Schmidt is a contractor and Senior Program Manager at the HCE.  He provides oversight and management of HCE Knowledge Translation and facilitates the creation of knowledge products for dissemination to the Audiologic field.  He also provides strategic planning, facilitation and balanced scorecard development.  He assists the Director with ensuring the long-term objectives and short term strategies and plans for the HCE are met by aligning with the congressional mandate that established the DoD HCE.  Mr. Schmidt also provides support to the HCE’s  5 directorates with developing day-to-day operational activities and is involved with the required planning, coordination and program management necessary to support resources. Additionally, he is responsible for the content maintenance of the HCE website.

He served 27 years as a member of the Air Force in the dental and medical career fields.  His duties took him to several bases in Europe as well as stateside assignments with both the Air Force and Army.  He received his Bachelor of Science degree in Total Quality Management from Friends University.  Mr. Schmidt brings a wealth of knowledge to the HCE in program management and leadership of groups both small and large, as well as an extensive background in the operations and leadership in the military healthcare system and certification as a Professional Project Manager (PMP).

  • JR Stefanson

    Southeast Regional Research Coordinator/Administrator

    Mr. JR Stefanson is the contract Southeast Regional Research Coordinator/Administrator for the Defense Hearing Center of Excellence, as well as an Associate Investigator for the U.S. Army Aeromedical Research Laboratory. Mr. Stefanson serves as HCE’s administrative contact for coordination and collaboration initiatives concerning auditory and vestibular projects for DoD within the Southeastern US. He also serves as an administrative lead for the Pharmaceutical Interventions for Hearing Loss working group, and is a member of a number of DoD working groups including the Collaborative Auditory and Vestibular Research Network Allied Neurosensory Warrior Related Research working group, and the Auditory Fitness for Duty working group.

    While serving the HCE’s mission, he also serves the Army Aeromedical Research Laboratory’s mission by developing and conducting studies in the areas of auditory protection, hearing protection device attenuation analyses in field and laboratory environments, hearing conservation, and auditory localization and situational awareness. Mr. Stefanson recently took on the role of Research Program Coordinator for the USAARL Auditory Protection and Performance Division, in which he works closely with the division director to assist in the project management of all ongoing studies for the division.

    Prior to working for HCE, Mr. Stefanson worked as a contract research investigator for General Dynamics Information Technology at the Army Aeromedical Research Laboratory.

  • Victoria Tepe, PHD


    Dr. Victoria Tepe supports the Department of Defense Hearing Center of Excellence as its contract Neuroscientist to advance scientific and technical objectives in the clinical care and prevention of hearing and balance injuries. Dr. Tepe works closely with interdisciplinary teams on various projects, facilitates coordination with other agencies, and supports the development of high-quality knowledge products to address critical knowledge gaps and problems in hearing, balance, and neurosensory function that challenge health and performance in military settings.

    Dr. Tepe has over 30 years of experience in academic, medical, and military research settings. She holds a PhD in Behavioral Neuroscience from Northwestern University. Dr. Tepe began her career in military medicine as a graduate research fellow at the U.S. Air Force School of Aerospace Medicine, and performed her postdoctoral research as a National Research Council fellow at the U.S. Air Force Research Laboratory. Prior to joining the Hearing Center, Dr. Tepe led projects in support of numerous other military medical programs and agencies, including the U.S. Army Military Operational Medicine Research Program, the Telemedicine and Advanced Technology Research Center, and the Defense Centers of Excellence for Psychological Health and Traumatic Brain Injury.

    Dr. Tepe’s published works address problems in cognitive psychophysiology, human factors, stress and resilience, human performance, and traumatic brain injury. Dr. Tepe has edited several books, including A Warrior’s Guide to Psychology and Performance (Potomac Books, 2010). She is also interested in military women’s health concerns, including brain and neurosensory injuries.

  • Quintin Hecht, AUD

    Research Audiologist

    Dr. Quintin Hecht is a Research Audiologist for the Department of Defense Hearing Center of Excellence. He is currently leading the Characterization of Acute or Short-term-acquired Military Population Auditory Shifts (CHASMPAS) research program in partnership with Walter Reed National Military Medical Center (WRNMMC) and Massachusetts Institute of Technology – Lincoln Labs (MIT-LL). Previously, he served as a research audiologist for “The Noise Study” at Joint-Base San Antonio, in collaboration with the Department of Veteran’s Affairs and the National Center for Rehabilitative Auditory Research (NCRAR). Dr. Hecht also reviews, composes and consults research protocols for future studies alongside our research coordinators and collaborating organizations.

    Dr. Hecht earned a Bachelor’s Degree in Communication Disorders as well as a Clinical Doctorate Degree in Audiology from Illinois State University. He is a graduate of the San Antonio Uniformed Services Health Education Consortium and has served as a staff audiologist and as the Chief of Audiology Services during his assignment at Wilford Hall Ambulatory Surgical Center, Lackland AFB, TX. Immediately preceding his work at the Department of Defense Hearing Center of Excellence, Dr. Hecht served as the Air Force Hearing Conservation Program Manager, located at USAF School of Aerospace Medicine, Wright-Patterson AFB, Ohio. Currently, Dr. Hecht is an audiologist (72C) for the U.S. Army Reserve.

    Dr. Hecht is a licensed and board certified audiologist as well as a CAOHC certified Course Director and Professional Supervisor of the Audiometric Monitoring Program. He has presented at numerous professional conferences and meetings, to include AMSUS, NHCA, JDVAC and CAVRN. Dr. Hecht’s research interests include noise-induced hearing loss, tinnitus, ototoxicity, musician hearing care and hearing protection device fit-testing.

  • Natasha Gorrell, MSPH, CPH

    Research Administrator

    Ms. Natasha Gorrell serves as a contract Research Administrator for the Hearing Center of Excellence at Joint Base San Antonio Lackland, Texas. Ms. Gorrell provides research project management to various ongoing studies, administrates the Collaborative Auditory/Vestibular Research Network, and provides general research and scientific inputs.

    Ms. Gorrell earned a Bachelor of Science in Biochemistry and Cell Biology from Rice University, and a Master of Science in Public Health degree from Johns Hopkins University. Ms. Gorrell has twelve years’ experience working in the research field, in topics including cytogenetics, protein engineering, cell biology, vaccines, occupational epidemiology, and health communication and injury prevention.

  • Nina Pryor, AuD

    Regional Administrator

    Dr. Nina Pryor is a contract Regional Research Coordinator/Administrator for the Defense Hearing Center of Excellence. Located at Wright-Patterson Air Force Base in Dayton, Ohio, Dr. Pryor serves the North Central region of the United States. She facilitates collaborations between DoD, VA, academic, and industry researchers; provides general administrative support for the HCE; and assists with research efforts at the Air Force Research Laboratory under the 711th Human Performance Wing as a Research Audiologist for the Battlespace Acoustics Branch. 

    Dr. Pryor earned a Doctor of Audiology degree from the University of Utah and a Bachelor of Arts degree in Psychology from the University of Toledo. Prior to joining the HCE, she was a Doctoral Fellow at the Dayton VAMC in Dayton, Ohio.

  • Veotria “Veda” Byrd

    Research Coordinator

    Ms. Veotria “Veda” Byrd serves as a contract Project Director and provides support for Hearing Fitness for Duty (FFD) developments at the Department of Defense Hearing Center of Excellence (DoD HCE) at Walter Reed National Military Medical Center (WRNMMC).

    She has over 12 years’ experience in research, and has worked in various healthcare and academia environments. She has worked in several research disciplines and capacities to include oncology, occupational health, general surgery, anesthesiology, pain medicine, substance abuse, and education.  Assignments were with Georgetown University Medical Center Lombardi Cancer Center (Washington, DC), Washington Occupational Health Associates (Washington, DC), Westat (in support of) The National Cancer Institute and Substance Abuse and Mental Health Services Administration (Rockville, MD and Hampton Roads, VA), The Geneva Foundation (Naval Medical Center Portsmouth, Portsmouth, VA), Duke University Medical Center, and the Durham VA Medical Center (Durham, NC).

    Ms. Byrd graduated from Columbia Union College where she earned a B.S. in Healthcare Administration.  She earned her Master’s in Public Health from Walden University and is currently completing dissertation requirements for her PhD in Public Health/Epidemiology

  • Julieta Scalo


    Dr. Julieta Scalo is a Biostatistician for the Hearing Center of Excellence, providing research support that includes study design, statistical analysis, and interpretation of findings. Dr. Scalo received a PhD in Translational Science, with a focus on pharmacoeconomics and pharmacoepidemiology, as well as a doctorate in Pharmacy (PharmD) from The University of Texas at Austin. Her research experience includes healthcare economics, health technology assessment, epidemiology, and evaluation of patient-reported outcomes and survey data. Prior to joining the Hearing Center of Excellence, Dr. Scalo’s research focused on pharmaceutical interventions for sleep disorders.

  • Khaya Clark, PhD

    Dr. Khaya Clark is the contract Regional Research Administrator for the Defense Hearing Center of Excellence and the National Center for Rehabilitative Auditory Research (NCRAR) at the Portland Department of Veterans Affairs (VA). In this capacity, Dr. Clark contributes to grant proposal development and applies her expertise in implementation science, mixed methods research, health information technology, and quality improvement to support NCRAR’s auditory and vestibular programs. Dr. Clark also serves as the chair of the Tinnitus Workgroup (TWG).

    Dr. Clark has over a decade of experience in academic, applied public health settings, and the VA. She completed a PhD in Sociology from the University of Oregon and a National Science Foundation Postdoctoral Fellowship at Emory University. Dr. Clark has extensive experience conducting mixed methods studies with clinicians and patients in the VA, Federally Qualified Community Health Centers (FQHCs), and community-based organizations.

  • Gabi Esquivel

    Gabi Esquivel is a contract Research Assistant for the Hearing Center of Excellence (HCE) Research Coordination Branch at Lackland Air Force Base, Texas. She supports all five branches of the HCE by assisting in writing research protocols and providing professional graphic design services for various HCE products. Prior to joining the HCE in 2019, Ms. Esquivel worked as a marketing coordinator for an architecture firm and as a curatorial assistant in an art museum.

  • Erin Cesario

    Research Coordinator

    Erin Cesario serves as a contract Regional Research Coordinator/Administrator for the Defense Hearing Center of Excellence (HCE) Headquarters at Lackland Air Force Base, TX. In this position, Ms. Cesario supports grantsmanship activities, quality and process improvement initiatives, proper implementation of research-related operating policies and procedures, and coordination of research protocols and outreach activities.

    Ms. Cesario started working with the HCE in 2015 at Naval Medical Center, San Diego as a Research Coordinator and has since transitioned into her current role after moving to Texas in 2018. Ms. Cesario began her research career in 2008 at the VA Hospital in La Jolla, CA, working for the University of California, San Diego's Psychiatry Department. as a Research Associate and eventual Project Coordinator of studies assessing the genetics of alcoholism and other substance use disorders. She progressed to Military Research in 2012 and has coordinated studies with Anesthesiology/Pain Medicine, the Wounded Warriors, Physical Therapy, and since 2015, Otolaryngology and the HCE.

  • Nicole Larionova

    Research Assistant

    Nicole Larionova serves as a contract Research Assistant for the Hearing Center of Excellence (HCE)  at Lackland Air Force Base, Texas.  She currently supports a number of HCE studies by recruiting, enrolling, and coordinating the participation of research subjects at BAMC and WHASC sites.

    Mrs. Larionova has worked with the HCE since 2017.  She began her research career in Behavioral Pharmacology at the UT Health Science Center at San Antonio (UTHSCSA) where she conducted experiments and trained and supervised fellow research staff, graduate students, and postdoctoral fellows.  Mrs. Larionova also worked with UTHSCSA's department of Lab Animal Resources where she reviewed study protocols and procedures to ensure proper adherence to IACUC and AAALAC standards, before joining the HCE where she now utilizes her six years of combined pre-clinical and clinical research experience to assist and coordinate hearing research.

  • Suheily M. Valderrama, PhD

    Regional Research Administrator

    Dr. Suheily Valderrama serves as a contract Research Administrator for the Hearing Center of Excellence at Joint Base San Antonio Lackland, Texas. Dr. Valderrama supports quality and process improvement initiatives, proper implementation of research-related operating policies and procedures, and coordination of research protocols and outreach activities.

    Dr. Valderrama completed her PhD in Psychology with a concentration in Health Psychology. Dr. Valderrama has six years' experience working in the military medical field, four of which are research specific, in topics including psychology, neuropsychology, health psychology, trauma, burn, emergency medicine, epidemiology, and rehabilitation.


  • Jenille Salomon, MBA, BSP

    Resources Program Manager

    Ms. Jenille Salomon is an HCE administrator and serves as the Resources Program Manager. As the program manager, she is in charge of all financial plans, oversight and spending. Ms. Salomon coordinates with Air Force Medical Service higher headquarters budget and manpower leadership for program requirements. She has been working with HCE budget and programs for several years as part of the Air Force Operations Agency. Assigned in the Operations Directorate, she also assists in contract management, and day-to-day operations.

    Ms. Salomon is an Air Force veteran. She received a Bachelor of Science in Healthcare and a Master of Business Administration from American Intercontinental University. Ms. Salomon brings wealth of knowledge to HCE in resource and administration program management within the military healthcare system



    Ricardo Santa Cruz is a Program Analyst for the Hearing Center of Excellence.  He is responsible for all Infection Control, Safety, and Educational Training and other associated programs within the HCE Branches.

    He served in the Air Force for 25 years in Surgical Specialty Services and the Ear, Nose, and Throat (ENT) sub specialties. During this time he was deployed to Iraq and Germany and participated on 12 surgical humanitarian missions to Central and South America. He has received certification in the International Association of Healthcare Central Service Management and the Central Sterile Processing. 

    He is also a certified Healthcare Team Coordination Manager for TeamSTEPPS and a coach for Lean Management Process for the HCE. Mr. Santa Cruz contributes a vast amount of knowledge to the Hearing Center of Excellence as a Management and Program Analyst along with his experience and leadership skills obtained from the Air Force managing the Air Force’s largest ENT Clinic.

  • Sharon D. Bryant, MSgt (Ret)

    Executive Assistant

    Ms. Sharon Bryant is currently a Management Assistant to the Divsion Chief and Deputy Division Chief for the Hearing Center of Excellence. She assists all headquarters HCE personnel with processing procedures and administrative tasks. In her capacity, she also manages the travel processes for all HCE funded travelers. Ms. Bryant also oversees the logistical budget as the supply custodian and GPC holder.

    Prior to joining the HCE, Ms. Bryant served in the Air Force for 24 years before retiring at the rank of Master Sergeant. During her Active Duty career, Ms. Bryant served as an Otolaryngology Surgical Technologist in the role of ENT Clinical Manager stationed at Lackland Air Force Base, Elmendorf Air Force Base, and Bitburg Air Base in Germany. She went on to lead the Audiology and Speech Pathology departments at Landstuhl before returning to Lackland in 2004.

    During her military career, she was an integral team member during humanitarian missions to Paraguay and Honduras assisting with ear examinations and surgical procedures to improve hearing for the underprivileged and during deployment to Iraq. She garnered several awards to include AF Achievement medals and an Army Commendation Medal. The experiences garnered as a leader in ENT has made Ms. Bryant a key member of the HCE family.

Information management Branch

  • Stacy Leonard

    Informatics Program Manager

    Mrs. Stacy Leonard is a contract Informatics Program Manager for the Hearing Center of Excellence. In this position Mrs. Leonard oversees the data analytics efforts within HCE and participates in the development of the Joint Hearing and Auditory System Injury Registry. She also establishes data use and sharing agreements with other DoD and VA agencies; provides guidance to clinical, functional and business operations process improvement groups; provides analysis to support cost saving initiatives and facilitates DoD and VA resource sharing agreements; and assists with the development of protocols required to support research efforts.

    Mrs. Leonard is an Army Veteran with 24 years’ experience within the Military Health System. The focus of her career has been support of DoD military healthcare computer systems, data repositories, and data quality. She developed and implemented the pharmacy third party insurance collections program at Brooke Army Medical Center. Mrs. Leonard served as a Tier II Clinical Support Coordinator throughout the DoD implementation of Pharmacy Data Transaction Service. She has held positions as System Administrator as well as Trainer for both CHCS and AHLTA. In 2010, she joined the Air Force Medical Operations Agency Data Quality Team as a Senior Health Systems Subject Matter Expert providing guidance to all Air Force Military Treatment Facilities. She later migrated to the Health Informatics Division of the Air Force Medical Support Agency as the Program Manager and Lead Functional Analyst for Biometric Data Quality Assurance Service.

  • William Lloyd

    Cybersecurity Consultant

    Mr. William Lloyd is currently a contractor supporting the Hearing Center of Excellence as a Cyber security Consultant. He is involved in several IT-focused projects, including the DoD-wide deployment of an electronic audiology application known as AudBase, which will standardize the audiogram collection process. To help pave the road for this deployment, Mr. Lloyd spent months wading through the arduous procedure known as certification and accreditation, to obtain an authority to operate and an authority to connect for AudBase.

    Before landing at HCE, Mr. Lloyd spent time working at Brooke Army Medical Center, then as a subject matter expert and technical trainer at the U.S. Army Medical Information Technology Center. In total, he has accumulated almost 15 years of private sector, and local and federal government, IT work experience, with a concentration in cyber security, system administration, and project management.

  • Kathy Swaba

    Senior Cybersecurity Analyst

    Ms. Kathy Swaba is currently a contract Cyber security Analyst supporting the Hearing Center of Excellence. She provides Cyber security support for the Enterprise Clinical Audiology Application (ECAA, also known as AudBase) which is being deployed and implemented at Military Treatment Facilities throughout DoD to improve the way data is computed and patient information is shared in a centralized environment.

    Ms. Swaba earned a Bachelor’s degree in Business Information Systems in 2003 and has over 19 years of in-depth Information Assurance and Cyber security experience from certifying and accrediting desktop applications to her support to large acquisition programs. Her career focus areas include the implementation and embedding of security in the life cycle of systems supporting multi-million dollar local and wide area networks, telecommunication facilities, data processing centers, information systems, cryptographic devices, and cross domain solutions. She has implemented Information Assurance programs where none existed and continues to improve programs that she supports.

  • Adam Zhang

    Informatics/Data Analyst

    Mr. Adam Zhang is a contract Healthcare Analyst with DoD Hearing Center of Excellence (HCOE), focusing on business intelligence and decision support. He currently supports the HCOE in developing the Joint Hearing and Auditory System Injury Registry for DoD and VA (JHASIR). His focus is developing and executing data collection and data exchange strategies of hearing related data for data sources from DMDC, TMDS, and other data sources under DHA. He provides facilitation and ad-hoc analysis, and Subject Matter Expert (SME) support on Hearing center relevant topics. 

    Mr. Zhang is a seasoned professional with strong expertise in utilizing a variety of complex business intelligence tools such as Tableau BI, SAS BI, SQL Server Analysis Service/Reporting Service, and Business Object in problem solving process. He has 15 years of MHS experience in various projects within DoD and VA, in the software development lifecycle and the use of DoD and VA managed data repositories such as: M2, MDR, DEERS, VA CDW, NPCD MedSAS datasets, and VINCI. Mr. Zhang graduated from the University of Georgia with MBA degree, specialized in Information Management and Finance. 

  • Christina Stretch-McClain

    Information Management Program Manager

    Ms. Christina Stretch-McClain is the contract Information Management Program Manager for the Hearing Center of Excellence (HCE).  Ms. Stretch-McClain oversees the implementation of the Joint Hearing Loss and Auditory System Injury Registry (JHASIR) training for Department of Defense and Veteran Affairs hearing workforce personnel.  She also assists with development of the JHASIR, data analytic efforts and IT related project management.

    Ms. Stretch-McClain is an Air Force veteran with 25 years’ experience within the Military Health System.  Before joining the HCE team, she was employed at the Air Force Medical Operations Agency (AFMOA) as the Project Manager on the ePatient Data Integrity Management and Support contract.  She managed the contract in support of the Composite Health Care System (CHCS), Armed Forces Health Longitudinal Technology Application (AHLTA) and Defense Enrollment Eligibility Reporting System (DEERS) data quality and analysis effort reducing potential patient safety events associated with patient identity and registration errors.  

    In previous positions, Ms. Stretch-McClain has served as an AFMOA Data Quality Subject Matter Expert, Data Quality Manager, Data Quality Analyst/Auditor, Medical Information Services Flight NCOIC and Health Service Management Specialist.  Ms. Stretch- McClain earned a Bachelor of Science degree in Computer Information Systems.

Quick Fact


The cochlea, vestibule, and labyrinth are part of the inner ear.

About Us

The Hearing Center of Excellence fosters and promotes the prevention, diagnosis, mitigation, treatment, rehabilitation and research of hearing loss and auditory injury. It supports the development, exchange and adoption of best practices, research, measures of effectiveness and clinical care guidelines to reduce the prevalence and cost of hearing loss and tinnitus among Warriors and Veterans. Read more

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