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Meet Our Research Staff

The ACTU Team


Susan L. Koletar, MD
Principal Investigator
Professor of Internal Medicine
(614) 293-8112


Michael F. Para, MD
Co-Principal Investigator
Professor of Internal Medicine
(614) 293-8112


William E. Maher, MD
Associate Professor of Internal Medicine
(614) 293-8112

Julie E. Mangino, MD
Professor of Internal Medicine
(614) 293-8112
David A. Wininger, MD
Associate Professor of Internal Medicine

 John A. Davis, PhD, MD
Assistant Professor of Internal Medicine


The ACTU Staff





Kathy Watson, RN
Nurse Manager

Kathy graduated from OSU 30 years ago and has been working at the Infectious Disease Clinic for 20 years. She is the Research Nurse Manager at the ACTU.

Jan Clark, PharmD
Research Pharmacist

Jan Clark, Pharm.D., is a specialty practice pharmacist who joined our staff in 1992. Jan provides the medications for our HIV drug studies. She is available to counsel both clinic and research patients regarding medication regimens, side effects, access to medications, and adherence issues. Jan also works with the clinical staff regarding drug interactions and dosing guidelines for patients with compromised kidney or liver functions.

Shirley Ventresca
Data Manager

Shirley is the Data Manager for the ACTU.  Originally from Buffalo, NY, she moved to Columbus in 2000 and has been with OSU Infectious Diseases ever since.  She is married and has a son and daughter.

Ben Smith
Manager, Medical Records

 Benjamin Smith is the Chart Room Manager for the ACTU. Ben joined the OSU Infectious Diseases Department in June 2011 and grew up in Detroit, Michigan.  Ben graduated from Wright State Univ. with a B.S. in Elementary Education.  However, he has decided to begin a new path in life and will enroll in a nursing program in May 2013.  Ben is married to Jamie and he and his wife own a hair salon in Clintonville.  Ben enjoys competitive bodybuilding and is an avid dog lover.


Jane Russell, RN, BSN, ACRN
Site Director, AETC
Jane has worked in Infectious Diseases for approximately 20 years, first as a research nurse and then with the AIDS Education and Training Center. Her free time activities include travel, reading and spending time with friends and family.

David Andrist
Program Manager for the AIDS Education and Training Center

David began working at the ACTG as the Outreach Coordinator March 26th, 2012. David has been working in HIV Prevention since 1994. He developed and facilitated HIV Prevention Education Programming for the gay community in Central Ohio from 1994-1998. In 1998 he became the AIDS Coordinator for HIV Prevention Funding Initiatives with Columbus Public Health. From 2000- 2006 he was the Director of Prevention and Education for the Columbus AIDS Task Force where he supervised 11 HIV Prevention Specialists working with many diverse community populations reaching over 100,000 people each year in combined program activities. He presented at the National HIV Prevention Conference held in San Francisco, March 1996, and at the AIDS Behavioral Prevention Research and Service Symposium, San Francisco, 1998, sponsored by The National Institute of Mental Health.

Isaac Navar
Data Manager and Office Production Assistant, ACTU and AETC
Isaac began working at the OSU ACTU in 2000 as an undergraduate student. Upon graduation, he remained with the division and now serves a dual role with the ACTU and AETC. Isaac is part of the data management department in the ACTG and helps the AETC as an office production assistant.

Research Nurses



Heather Harber, RN
Heather has been a nurse for 24 years. She has been a research nurse for the ACTU since 2007. In her spare time she enjoys spending time with her husband and 2 daughters.
Mark Hite, RN
Mark has been a nurse since 1998. After working in the Transplant Unit at OSU Medical Center, he joined the AIDS Clinical Trials Unit as a Research Nurse in 2001. Mark works with people who have volunteered to participate in studies to help find the best treatments for HIV.