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Executive Leadership

Through our clinical services, evaluations, and research, we are dedicated to helping return people to productivity and bringing true value to our clients and study sponsors.


David C. Pulver, MD

David C. Pulver, MD, CEO and Founder of The IMA Group, is certified by the American Board of Internal Medicine and the American Board of Addiction Medicine, and serves as Clinical Assistant Professor of Medicine at New York Medical College. Since founding IMA 30 years ago, Dr. Pulver has overseen the growth of the company from a single office in White Plains, NY to a network of more than 80 offices in 20 states and the District of Columbia. He received his MD degree from New York Medical College in 1975.


Mark I. Weinberger, PhD, MPH

Mark I. Weinberger, PhD, MPH, President of The IMA Group, is a licensed psychologist and psychiatric epidemiologist who joined IMA in 2011. Dr. Weinberger received his PhD in clinical psychology from the University of Massachusetts Amherst and his MPH in epidemiology from New York Medical College. In 2018, Dr. Weinberger completed a Graduate Professional Certificate in Principles of Finance from Harvard’s Extension School. He serves as Clinical Instructor of Psychology in Psychiatry at Weill Cornell Medical College. He is responsible for the daily operations of the company.


Victor Cohen

Victor Cohen, Chief Financial Officer, joined IMA in 2019 with extensive experience as a CFO of private equity backed healthcare and healthcare service businesses with broad management, corporate development and financial expertise. Prior to his work as a CFO, Victor was a private equity investor with Vestar Capital and Capital Z. Earlier in his career he helped oversee M&A at Assurant and worked at JP Morgan. Victor earned a B.S. from Lehigh University and an MBA from NYU’s Stern School of Business.  He manages all financial operations for the company.


Doug Markham

Doug Markham, Chief Strategy Officer, joined IMA in 2019, with a broad experience in healthcare, insurance, and managed care services. Prior to joining IMA, he held executive leadership positions in sales, operations and finance exceeding 25 years of experience with York Risk Services, CareWorks Managed Care Services, and Concentra. Doug’s role is responsible for setting strategic and tactical direction as well as improving key business processes. He holds a Bachelor of Science degree in Mathematics from Vanderbilt University.


Jelena Kunovac, MD, MS

Jelena Kunovac, M.D., M.S., joined IMA in 2019 as Chief Scientific Officer. With more than 25 years of experience in the clinical research industry, she has founded three research centers and conducted more than 450 clinical trials. Board Certified in Psychiatry, she completed her Residency Training at the University of California, San Diego after having earned her Master’s Degree in Biological Psychiatry and an M.D. from the University of Belgrade School of Medicine where she graduated as the Valedictorian of her class. In addition, Dr. Kunovac is an Adjunct Assistant Professor of Psychiatry at the University of Nevada, Las Vegas.


Michael Koenig

Michael Koenig, Chief Technology Officer, joined IMA in 2010. Michael has over 20 years of software and system development experience. Michael has experience mentoring and building software departments for several industries including Healthcare, Automotive, Environmental, Networking, Pharmaceutical and Financial. He received his Bachelor of Science in Mathematics in 1985 from SUNY Oneonta and completed a one-year degree in computer science at Hofstra University.  His responsibilities include overseeing IMA’s entire IT proprietary platform and initiatives. 


Jennifer Goldfarb, MSN, RN, CCRP

Jennifer Goldfarb, MSN, RN, CCRP, joined IMA in 2019 as Vice President of Clinical Research, providing leadership and oversight for all clinical research operations.  She is an internationally-recognized clinical research industry expert and leader with more than 20 years of nursing, clinical research operations, leadership, and management experience. She is a certified member of the Society for Clinical Research Associates (SoCRA) since 2003 and is an elected member of the Board of Directors since 2016.


Lisa A. Letarte, JD, SPHR, SHRM-SCP

Lisa A. Letarte, JD, SPHR, SHRM-SCP, Vice President of Human Resources and Chief Compliance Officer. Lisa joined IMA in 2019 and comes to IMA with over 25 years of experience in human resources and extensive experience in compliance, employment law, and mergers & acquisitions. In her HR role, Lisa oversees employee benefits, payroll, employee relations and talent acquisition for all IMA affiliates. Lisa attended the United States Military Academy at West Point and Seattle University School of Law. As Chief Compliance officer, Lisa is responsible for the IMA Corporate Compliance program.


Tim Weaver

Tim Weaver, Vice President of Government Services, joined IMA in 2019. Prior to joining IMA, Tim served as Regional Vice President of Operations at Fresenius Medical Care North America, a healthcare company focused on people with renal and other chronic conditions. He oversees the operation of IMA’s 80+ medical offices as well our operations center in Albany. Tim earned a bachelor’s degree from Eastern Michigan University and an MBA from Thunderbird School of Global Management.


Barbara Young

Barbara J. Young, Vice President of Business Development, joined IMA in 1998. She is the former Medical Relations Coordinator for the New York State Division of Disability Determinations, where she served as a Medical Relations Officer, Contract Manager, and Coordinator of Medical Relations Activities on a statewide basis. She attended SUNY Albany graduating with a bachelor’s degree in psychology and a graduate degree in public administration. Her role at the IMA Group is to lead our business development and marketing efforts aimed at expanding our service offering and geography.


Jeanine M. Zimmerman

Jeanine M. Zimmerman, Vice President of Finance, joined IMA in 2007. She has over 20 years of extensive experience as a Controller and CFO. Prior to joining IMA, she managed the accounting/ finance departments and operations of a foreign-based corporation. In her role, she is currently responsible for the financial and business decisions of the company.