Faculty & Staff

Dr. Joe Weber, DHSc, MPAS, MBA, PA-C, Sr. Chaplain
Program Director and Principal Faculty

Dr. Weber is a board-certified physician assistant with clinical experience in emergency medicine and behavioral health, holds two Master’s degrees (MPAS and MBA), and a Doctorate of Health Sciences (DHSc). Dr. Weber has several years of teaching experience including experience on the faculty of the Lock Haven University Physician Assistant Program. He was also the Founding Program Director of the Lake Erie College Physician Assistant Program in Painesville, Ohio. He has received multiple awards including the Teaching Excellence Award from Lakeland Community College in 2012, and he was inducted into the Lakeland Foundation Alumni Hall of Fame in 2016. Dr. Weber has been actively involved in leadership with many organizations. He was formerly on multiple boards of directors including Lifeline Inc, The Lake County Free Clinic, and the Lake Hospital Foundation. He has over 20 years of business and financial management experience and has been quoted in magazines such as Business Week and Crain’s.

Ms. Mary Jean Leonardi, MAT, MMS, PA-C
Associate Clinical Director and Principal Faculty

Ms. Leonardi became part of the Presbyterian College family in April 2020, joining the Physician Assistant Program as Associate Clinical Director and Principal Faculty.  She brings with her a strong background in science education.  She received a Bachelors in Science (BS) in Zoology and a Masters in Teaching (MAT) from Duke University.  She has been in the classroom for more than twenty years, including twelve years as Adjunct Faculty with USC Upstate teaching Anatomy and Physiology and most recently six years as Instructor with the Wake Forest University Physician Assistant Program.  She graduated from the Wake Forest University Physician Assistant Program in 2014 with a Masters in Medical Science (MMS).  She has been a board-certified physician assistant in hospital medicine since that time, and continues to work clinically with Spartanburg Regional Healthcare System as a hospitalist PA.


Dr. F. Gregory Mappin, MD, MBA
Medical Director and Principal Faculty

Dr. F. Gregory Mappin was Chief Medical officer and Vice President of Medical Affairs for Self Regional Healthcare and a general thoracic surgeon. He now sits on their Board of Trustees. Mappin received his undergraduate and medical education at Duke University and then completed a general surgery residency at the University of Virginia, Charlottesville. He served in the U.S. Air Force from 1985 through 1992 and then entered private practice in general and thoracic surgery in Greenwood, SC. In 2005 he completed an MBA program at the University of Tennessee, Knoxville. In private practice, he has served as managing partner of a multi-specialty surgical practice, Medical Staff President, and later, as a board member of Self Regional Healthcare. In 2006 he joined Self Regional Healthcare as the Vice President of Medical Affairs for Self Regional Healthcare. His responsibilities include medical staff relations, supervision of the Medical Staff Services office, oversight of professional liability, and chair of the SRH institutional review board.

Janet Leahy Wilson, MSPAS, PA-C
Clinical Director and Principal Faculty

Mrs. Wilson is a board certified Physician Assistant with experience in Emergency Medicine, Women’s health, Family Medicine, and Urgent Care. She earned a Bachelor of Arts in Art History from The University of North Carolina at Chapel Hill and a Master of Science in Physician Assistant Studies from the Medical University of South Carolina. She is currently working towards a certification in Lifestyle Medicine. Ms. Wilson works clinically in the Spartanburg area.

Antonette Montalvo, MSN, CRNP, PNP-BC, BSN, RN
Adjunct Faculty

Mrs. Montalvo recently joined PC in June 2021 as Adjunct Faculty in the Physician Assistant Program teaching Anatomy and Physiology courses. She has been a board-certified Pediatric Primary Care Nurse Practitioner for 8 years and Registered Nurse for nearly 10 years, and has worked in both clinical and community settings, primarily in underserved, low-resource areas. Antonette also has on-going experience as Adjunct Faculty, and concurrently teaches at Lander University in the Nursing School, where she has taught since 2018. She is also owner of Antonette Montalvo Consulting and Coaching Services — where she serves as a Community Health Consultant and Coach and Mentor for Nurses, cofounder of a community-focused grassroots effort committed to addressing health disparities in vulnerable communities, and author of Visionary Nurse™: 90-days of Inspirational Musings on Being Influentially Visionary, which is dedicated to inspiring others to dare to be influentially visionary™. Antonette has sat on a variety of boards, spoken at multiple conferences and universities, and worked with many individuals and organizations, both nationally and globally, to highlight the important role nurses have as change agents in creating cross-sectoral, sustainable transformation in healthcare. Antonette received her BA in Education with a minor in Spanish from Emory University, and her BSN and MSN in Pediatric Primary Care with a graduate-level global health minor in nursing from the University of Pennsylvania School of Nursing, which has been accompanied by an extensive amount of experience living and traveling throughout Central America and the Caribbean, which solidified her belief that cultural competency and sensitivity is a key to establishing effective change.


Dr. Tim Pysell, DrHA, MMSc., PA-C, DFAAPA
Admissions Director and Principal Faculty

Dr. Pysell began his career in medicine as a student athletic trainer before graduating with honors from Presbyterian College. He then became a certified athletic trainer for Davidson College in Davidson, NC in 1991. After working for Harlem Globetrotters International as an athletic trainer from 1994-1995, Dr. Pysell attended physician assistant school at Emory University School of Medicine in Atlanta, GA where he completed a Master of Medical Science and physician assistant certification in 1997. From 1997 to 2013, Dr. Pysell practiced emergency medicine at several hospitals in Georgia and Tennessee. From 2004 to 2013, Dr. Pysell served as Director of Advanced Practice Clinicians (physician assistants and nurse practitioners) for TEAMHealth, where he was responsible for over 500 physician assistants and nurse practitioners in 10 states. Before returning to Presbyterian College, Dr. Pysell served Vice President of Value Based Services and Director of Physician Assistants for OrthoCarolina in Charlotte, NC.

Dr. Pysell is a founding member of Tennessee-1 Disaster Medical Assistance Team (TN-1 DMAT), a division of the Department of Health and Human Services that provides medical care to victims of federally-declared disasters. He has served as a physician assistant and, since 2007, as the team’s Deputy Team Leader. He has served in several national and international disasters since 2004. Dr. Pysell completed a doctorate in Health Administration in 2010, has served on several state and national PA organizations, and is a founding member of the United States Department of Homeland Security.


Amanda Stevenson-Cali, MPH, PA-C
Academic Director and Principal Faculty

Ms. Stevenson-Cali joined PC in September 2017 as the Academic Director to the Physician Assistant Program. She has 12 years of experience as a PA in Orthopedic Surgery and Emergency Medicine. She maintains clinical practice at Spartanburg Regional Medical Center’s Emergency Department, a Level 1 trauma center, where she has been since 2010. Amanda attended PA school at Touro College- Manhattan and also holds a Masters of Public Health from the University of South Florida.

Abigail Q. Sweet, MPH
Metrics Analyst

Ms. Sweet joined PC in October 2019. She holds a BS in Biology and a BA in Mathematics from Converse College and a Masters of Public Health from University College Dublin, Ireland. Ms. Sweet is the Metrics Analyst for the Physicians Assistant Program, managing data for the accreditation process.


Josh Tyson, MHA
Admission Coordinator and Office Manager

Mr. Tyson joined the PC Physician Assistant Program as the administrative assistant in October of 2016. He comes to Presbyterian College with a B.A. in Public Health from the University of South Carolina and a Master’s of Health Administration from Grantham University.

Steering Committee

Holbrook W. Raynal, M.D., D.H.A., F.A.A.F.P.

With 35 years of clinical and administrative experience, board certification in Family Medicine and Geriatrics, and having earned doctoral degrees in Medicine and also in Health Administration from the Medical University of South Carolina and having completed the Fellowship in Integrative Medicine at the Center for Integrative Medicine at the University of Arizona, Dr. Raynal joined Health Integrity, LLC in September 2014.  He brings experienced practical knowledge in organizing and providing health care in the primary care environment. His varied background encompasses clinical patient care, research in the primary care environment, teaching in an academic medical center, and executive leadership in both the private practice and academic environments

After practicing medicine in the local community for 25 years, in 2005 Dr. Raynal joined the faculty of the School of Medicine at the University of South Carolina in the Department of Family and Preventive Medicine.  Then, in 2008 he developed a primary care and integrative medical practice in affiliation with The Cliffs Communities, a multi-centered residential living corporation. More recently prior to joining Health Integrity, LLC, in 2012 he established another community primary care practice in conjunction with Greenville Health System in his hometown of Clinton, SC.

He has been married to his long-term confidant, advisor, and best friend Susan since 1977 and they have two children and three grandchildren.

Don Raber, Ph.D., Provost Presbyterian College

Dr. Don Raber started as PC’s provost on January 2, 2013. Raber joined the PC faculty in 2002 in the Political Science Department and served most recently as dean of Academic Programs.

He earned his B.A. in political science from Furman University, graduating summa cum laude and receiving membership in Phi Beta Kappa. He received his M.A. and Ph.D. in political science from Harvard University, where he studied the presidency and the federal bureaucracy. Outside of his service to PC, Raber was a past president of the South Carolina Political Science Association and the former editor of its Journal of Political Science.

Even as Don went to graduate school at a research-oriented institution, he appreciated the value of a liberal arts education coupled with the individualized commitment to student success. Having spent time in South Carolina as both a student and a professor, Don recognized how PC stands out as an ideal place to teach, study, and work with young people.

Neal Goodbar, M.D.

Dr. Neal Goodbar is a family medicine doctor in Clinton, South Carolina and is affiliated with GHS Greenville Memorial Hospital. He received his medical degree from Medical University of South Carolina College of Medicine and has been in practice for 6-10 years. He is one of 158 doctors at GHS Greenville Memorial Hospital who specialize in Family Medicine.

Stan Reid, M.D., M.Div

Stan Reid is a native of Woodruff, SC, and has lived in Greenville, SC since leaving active service in the U.S. Army in 1991 where he was a Lieutenant Colonel in Medical Corps. Stan served on active duty for 13 years. In his last assignment, he was Chief of Orthopaedic Surgery Service and Director and Chair of the Orthopaedic Surgery Residency Program at Eisenhower Army Medical Center, Ft. Gordon, Georgia. From 1991 through 2007, he continued as a clinical instructor in Orthopedic Surgery and maintained a busy private practice in spine surgery, his subspecialty following his fellowship and research at Vanderbilt University Hospital in Nashville, Tennessee in 1987-88.

Stan is a graduate of Presbyterian College in 1974, where he met his wife, Patricia Lake Reid. They have four adult children, including Jennifer Reid Webb, who graduated from Presbyterian College in 1999. Answering a call to further service, Stan graduated from Princeton Theological Seminary in May 2014 with a Master of Divinity degree. He is an ordained Minister of Word and Sacrament in Foothills Presbytery, serving in transitional ministry for several congregations in the Upstate following his ordination in February 2015. Currently, he is designated supply pastor of Westminster Presbyterian Church in Greenwood, SC. He is Treasurer of Foothills Presbytery since June 2016 and serves on, or leads, several working groups and standing committees in Foothills Presbytery.

Stan has served on the Presbyterian College Board of Trustees since January 2016 and is a member of the Pharmacy School Committee, the Resources Management Committee, and several subcommittees. He is excited to serve on the Steering Committee for the Physicians Assistant School at Presbyterian College.

Marjorie H. Anderson, PA

Marge Anderson was born in Passaic, New Jersey lived in East Orange, NJ, Chicago, Atlanta, Miami and Germantown, TN with her family, until deciding to attend Emory College from 1958 to 1962 where she completed her undergraduate studies and received a BA degree. She trained as a Medical Technologist in California in 1963. She later received her Master’s in Secondary Science Education at Georgia State in 1974 and then completed her Bachelor’s of Medical Science in 1980, now the Physician Assistant Division of the Emory University School of Medicine. After graduating from the Physician Assistant program she worked under the direction of Dr. Travis Meredith in Emory’s Ophthalmology department where due to her extensive lab experience as a medical technologist was able to work with patients and assist in publishing a research paper on the causes of traction retinal detachments. She then worked with Dr. Waldo Powell and later Dr. William C. Wood in the Department of Surgical Oncology with breast cancer patients for 15 years and later with Dr. C. Dan Smith in General Surgery.

After retiring in 2006 Marge has been busy as a very active community volunteer. She currently serves on the Emory College Alumni Board. She also provides scholarships and mentors current Emory students. Marge strives to interact with as many students as possible at Emory, Presbyterian College, and in the various places that she volunteers. She is a true advocate for students and has the desire to advance and promote the most needed areas in the medical field. This is what led Marge to both support new Physician Assistant Studies Program and to serve on their steering committee.

Marge is also an active member of Peachtree Presbyterian Church in Atlanta, GA where she actively volunteers with local mission projects and has taken international mission trips to Costa Rica and Egypt. She is involved in Presbyterian Women which helps to support Days for Girls that helps young girls in Malawi, Africa to provide personal necessities so that the girls can attend schools and also plans to help provide sewing machines. Marge has two children, two grandchildren and loves to square dance, travel, sing in the church choir and spend time with her husband Richard Oliver, Presbyterian College class of ‘56.

Leta Tribble, Ph.D.

Dr. Tribble joined the Greenwood Genetic Center in 2000 and serves as the Director, Division of Education. In this position, Dr. Tribble is involved in the development of intramural and extramural education programs and curriculum design. The Division provides multiple opportunities in genetics education to various student populations including high school, undergraduate, teaching professionals, the general public and healthcare professionals and students. Dr. Tribble assists in the coordination of the Center’s accredited medical residency and post-doctoral training programs.

Raenota Merrill, PA

Raenota Merrill is a graduate of Mercy College Physician Assistant Program in 1987. After graduation she worked in an internal medicine practice, seeing and managing the care of adult patients. She also worked in a family practice seeing patients of all ages. While retired, Raenota will still fill in for practitioners to continue her love of patient care. Raenota is excited to be on the steering committee and looks forward to contributing to the growth of the program.

Susan Gay, M.Ed

Susan Gay is a medical publisher and content strategist with over 25 years experience in medical publishing leadership. Known for her foresight and vision in creating ground-breaking publications, she has published several hundred books, journals, and multi-media products. Many of them are still market leaders today. Her creative imprint can be seen in such pioneering works as the 5-Minute Clinical Consult and the Netter Collection reference works. As Vice President and Publisher at Williams & Wilkins (now Wolters Kluwer Health), Susan was the first clinical publisher to apply branding strategies to a clinical publishing program. Earlier in her career, she was an award-winning editor at Mosby and served as president of the American Medical Publishers Association.

As the digital era began to fundamentally reinvent medicine and health care delivery, Susan created her own firm to focus on multi-channel content creation, create greater brand awareness of professional information products, and help publishers and societies extend their existing portfolios. She has worked with many companies and societies in medical fields including American Medical Association, American Academy of Pediatrics, Sage Publications, Medcases, Springer, MediMedia, LWW, Elsevier, Harcourt Health Sciences, and Thomson-PDR.