Faculty Directory

Meet Our Faculty

From renowned researchers to experienced industry professionals, our faculty members bring a wealth of knowledge and expertise to the classroom.

Angela Duell
Asst. Program Director, Occupational Therapy



Dr. Angela Duell is an Occupational Therapist and the Occupational Therapy Assistant Program Director at Parker University in Dallas, Texas. Over her 23-year career, Dr. Duell has worked in a variety of settings servicing adults with physical disabilities. She has also held the position of Director of Physical Medicine and Rehabilitation. In addition to her clinical experience Dr. Duell has been in higher education for 12 years, teaching at the University at Buffalo and establishing the Parker University Occupational Therapy Assistant program in 2015.
Dana Hollandsworth
Professor & Department Chair, Chiropractic Sciences


Dr. Dana Hollandsworth graduated with a Bachelor of Science in Movement Science from the University of Illinois Chicago. She is a Doctor of Chiropractic alumnus of Parker College of Chiropractic. She practiced in both Washington and Illinois before moving to Texas to pursue teaching in higher education. She joined Parker University as a faculty member and her first responsibility was implementing force sensing table technology (FSTT) throughout the Doctor of Chiropractic technique curriculum. She has since taught varied courses and labs throughout the Doctor of Chiropractic curriculum. Dr. Hollandsworth completed a Master of Science in Higher Education Administration at Texas A&M University-Commerce. She enjoys her current role as a Professor & Department Chair of Chiropractic Sciences and keeps hands-on with patients in her part-time animal chiropractic practice. She continues to serve the profession by providing peer review for several conferences and continuing education providers. She enjoys presenting her research interests including student motivation and mindset, psychomotor skill development, and analysis of manipulative force across various chiropractic adjusting techniques in human and animal populations. When she’s not working, you can find her at the barn or spending time with her husband and three dogs.
Drew Riffe
Dean, College of Health Sciences



Dr. Drew Riffe is the Dean of the College of Health Sciences at Parker University and a graduate of the chiropractic program, class of 2004. Dr. Riffe holds degrees in Chiropractic (doctorate) and Community Health Promotion (bachelor) as well as licenses in massage therapy and massage therapy instruction. He has been with Parker University for 16 years and is passionate about loving service. Dr. Riffe has served on the Alumni Board of Directors for Parker University and many other committees as well.
Garry Ladd
Program Director, Public Health & Clinical Research


Dr. Garry Ladd earned his undergraduate degree in Biology and holds graduate degrees in Exercise Science, Kinesiology, Health Studies, and Health Science. He completed his Doctor of Health Science (DHSc) degree at Nova Southeastern University with a concentration in Health Promotion and Disease Prevention. During Dr. Ladd’s career in higher education, he has held undergraduate and graduate appointments including Professor and Chair of Health and Exercise Science, Program Director of Community and School Health, Senior Lecturer in Physical Therapy, Professor of Public Health and Human Performance, and Program Director for Public Health & Clinical Research. He is a certified Exercise Physiologist and Physical Activity in Public Health Specialist through the American College of Sports Medicine. Dr. Ladd is a retired military reservist and served in the medical field for both the Navy and Army.
J. Donald Dishman
Professor & Dean of Graduate Clinical Neuroscience Programs


Dr. Dishman has taught electrodiagnostics for over thirty years to physicians throughout the US. In addition to the Doctor of Chiropractic Medicine degree, he was awarded a Master of Science degree in Neurophysiology from the renown Institute for Sensory Research of Syracuse University where he studied for seven years under world renown neurophysiologist, Dr. Stanislov Bolanowski. In addition, he is a Diplomate and Fellow of the International Academy of Chiropractic Neurology. He also holds the titles of Diplomate and Fellow of the International Board of Electrodiagnosis. Currently, he serves as President of the International Academy of Chiropractic Neurology. Dr. Dishman was the founding Chairman of the International Board of Electrodiagnosis and continues to serve as edx advisor to the International Board of Chiropractic Specialties. He served as Professor of Anatomy and Director of Research at Palmer College of Chiropractic Florida for 15 years. Dr. Dishman was also a Professor at Northeast College of Health Sciences for over 14 years, where he taught courses in clinical neuroscience, anatomy and the profession’s first electrodiagnostics course for chiropractic students. He currently is Dean of Graduate Neuroscience Degree Programs at Parker University. Dr. Dishman’s research efforts have yielded publications in many prestigious international journals such as Journal of Neuroscience Methods, Spine, Journal of Manipulative and Physiological Therapeutics, and Electromyography and Clinical Neurophysiology. He was awarded the prestigious “Scott Haldeman Award” for best original research paper at the Sixth Biennial Congress of the World Federation of Chiropractic in Paris, France. He is a past and current research grant recipient from the Foundation for Chiropractic Education and Research, as well as the Center for Complimentary and Alternative Medicine of the National Institutes of Health.
Joe Lintz
Program Director, Health Information Management (HIM)



Dr. Joe Lintz, DHA, RHIA, CHDA is the Health Information Management (HIM) Program Director at Parker University. Prior to joining Parker University in 2012, he served as the HIT program coordinator at DeVry University in Cleveland, Ohio and as a clinical data analyst at Nationwide Children’s Hospital in Columbus, Ohio. He has 20 years of experience in the practice of healthcare statistics, research methods, and data analytics. He received his doctoral degree in Health Administration (HA) from Central Michigan University and both his bachelor’s degree in Health Information Management and Systems (HIMS) and Master’s degree in Allied Health Management from The Ohio State University in 2003 and 2007 respectively.
Jonathan Ward
Asst. Professor, Clinical Neuroscience; Department Chair, Clinical Neuroscience


Dr. Jonathan Ward is an Assistant Professor of Clinical Neuroscience, and Department Chair for the MS in Clinical Neuroscience at Parker University. Prior to his appointment in the Clinical Neuroscience program, Dr. Ward held an appointment in the Bachelor of Anatomy program at Parker University. He has experience instructing students in basic and clinical sciences alike. His area of interest centers around eye movements. Their use in the assessment and diagnosis of neurological conditions and in neurorehabilitation. Having suffered a mild traumatic brain injury through participating in martial arts, he is especially focused on eye movements’ role in evaluating and managing mild traumatic brain injuries. Considering himself a lifelong learner, an ideology he imparts to his students, Dr. Ward is currently in the dissertation phase of a Ph.D. program. The Ph.D. in Health Sciences with an emphasis in neuroscience is through Liberty University. Dr. Ward’s dissertation focuses on eye movement inclusion in cornerstone mild traumatic brain injury assessments. Dr. Ward likes to spend his free time with his family. His wife of eleven years and their two young boys. Living on the coast of South Carolina, they enjoy going to the beach and other outdoor activities that the coast offers. He is honored to be a part of the clinical neuroscience program at Parker University and to be able to serve the student population.
Kathryn Hartlieb
Professor & Program Director, Functional Nutrition


Kathryn Hartlieb, PhD, Registered Dietitian Nutritionist, is a Professor and Program Director for the Masters of Science in Functional Nutrition at Parker University. She is an international health behavior change communication researcher and educator. Dr. Hartlieb has been a member of the Motivational Interviewing Network of Trainers (MINT) for over 10 years and was named a Pediatric Obesity Subject Matter Expert by the Commission on Dietetic Registration.
Kristi Carbonelli-Cloutier
Department Chair, Basic Sciences; Assoc. Professor, Chiropractic Sciences


Dr. Carbonelli is Chair of the Department of Basic Sciences at Parker University and an Associate Professor in the Department of Chiropractic Sciences. Over the past three years she has taught Geriatrics, Chiropractic Business Promotion and Leadership, The Business of Chiropractic, Documentation, Communications and Full Spine Adjusting I, II and III. Prior to being Academic Faculty, Dr. Carbonelli was a Clinic Faculty Doctor for two years. Dr. Carbonelli has extensive experience in auditing. She was an Initial Clinical Reviewer for CID Management and a Peer Reviewer for Dane Street for many years. Dr. Carbonelli has over 10 years of experience being a Clinic Director at various chiropractic corporations. She has presented at numerous conferences, seminars and corporate events.
Tammy Fogarty
Dean, Health and Human Performance


Dr. Fogarty is the Dean of Health & Human Performance at Parker University. She is a Registered Dietitian and Licensed Nutritionist with over 25 years experience specializing in medical nutrition therapy.