Faculty & Staff


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

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.


Mikala Riddlesworth Fowler, MMS, PA-C
Clinical Director

Professor Fowler joined PC in November of 2016 as the Clinical Director to the Physician Assistant Program. She was previously the Clinical Coordinator for the PA program at South College in Knoxville, TN for the last 5 years. She has 12 years experience as a PA in Family Medicine, Urgent Care, and specializes in Dermatology. Mikala also served 3 years in the National Health Service Corps providing healthcare to medically underserved communities in Tennessee while participating in the loan repayment program. She is a graduate of Methodist University obtaining a Masters of Medical Science degree in PA studies. She also attended the University of Central Florida receiving a B.S. in Molecular/Microbiology and Psychology.


William Boyd, III, MSM, PA-C
Clinical Director

Mr. Boyd graduated with honors Magna Cum Laude, National Honors Society, and Delta Kappa Honors Fraternity, with a B.S. in Psychology from Presbyterian College in 2009.  He then went on to receive his Masters in Physician Assistant Studies from Trevecca Nazarene University in 2013.  Since that time, Mr. Boyd has worked as an orthopedic PC with a specialization in total joint replacement and also foot, ankle, and spine trauma.

Trey has been involved with the PC PA program since its inception as a member of the PC Advisory Committee.  Trey was the first member of the committee and has help developed the program from the start.  After serving on the Advisory Committee and helping develop and guide the curriculum, Mr. Boyd has decided to rejoin his alma matter as a faculty member and assume the role of Clinical Director.


Dr. F. Gregory Mappin, MD, MBA
Medical Director

Dr. F. Gregory Mappin is Chief Medical officer and Vice President of Medical Affairs for Self Regional Healthcare and a general thoracic surgeon. 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.


Dr. Jim Wetzel, PhD
Professor and Principal Faculty

Dr. Wetzel will teach the A&P series courses. Dr. Wetzel joined PC in 1990 with an extensive experience in electron microscopy, human anatomy, embryology, and ichthyology. Dr. Wetzel teaches both undergraduate and within the graduate school of physician assistant studies. His academic credentials include B.S., Point Park College, M.A., California State University, and Ph.D., Clemson University.


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

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

Ms. Stevenson-Cali joined PC in September 2017 as the Academic Director to the Physician Assistant Program. She has 12 years experience as a PA in Orthopedic Surgery and Emergency Medicine. She will maintain 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.


Josh Tyson

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 is currently pursuing his Master’s of Health Administration from Grantham University.

Advisory Committee

Kendra Woodson, Presbyterian College Registrar and Director of Records
Abby Young, PA-C Ortho Charlotte
Laura Musgrove, PA-C Medical Center Clinic
Trey Boyd, PA-C PA Clinical Director
Tim Pysell, PA-C PA Admissions Director
William Heisel, PA-C OrthoCarolina and Joe Gibbes Racing
Kayla Taverneir, PA-C Abbeville Family Medicine
Katherine Massengill, PA-C Pelham OB/GYN
Tallon Harding, PA-C, MUSC Greenville