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Featured Staff Member
Kristin A. Heath, DBA, MBA, MHA
Executive Director
Dr. Heath brings more than 20 years of clinical and operations experience in radiation oncology and proton therapy to the UF Health Proton Therapy Institute. As Executive Director, she leads and implements the strategic vision and goals of the Institute and ensures the highest levels of clinical quality, technology, infrastructure, and workforce excellence.
Read Full BiographyExecutive Team
Kristin A. Heath, DBA, MBA, MHA
Executive Director
Nancy Price Mendenhall, MD, FACR, FASTRO
Medical Director
Perry Johnson, PhD
Director of Physics
Physicians
Julie A. Bradley, MD, MHCDS
Physician
Curtis Bryant, MD, MPH
Physician
Roi Dagan, MD, MS
Physician
Daniel J. Indelicato, MD
Physician
Samuel Jean-Baptiste, MD, MS
Physician
Raymond B. Mailhot, MD, MPH
Physician
William M. Mendenhall, MD, FACR
Physician
Romaine Charles Nichols, Jr., MD
Physician
Paul Okunieff, MD
Physician
Nurse Practitioners
Teena Burchianti, MSN, APRN, ANP-BC, OCN®
Radiation Oncology Nurse Practitioner
Kerri Copeland Jarrell, APRN
Radiation Oncology Nurse Practitioner
Toni Ruffino, APRN
Radiation Oncology Nurse Practitioner
Physicists
Mark Artz, PhD, MBA
Physicist
Hardev Singh Grewal, PhD
Physicist
Soon Huh, PhD
Physicist
Maria Mamalui, PhD
Physicist
Jiyeon Park, PhD
Physicist
Mohammad Saki, DSc PhD
Physicist
Emma Viviers, MSc
Physicist
Twyla Willoughby, PhD, FAAPM
Physicist
Yawei Zhang, PhD
Physicist
Support Staff
Walt Moore
Chief Financial Officer
Tim Buist
Director of IT
Robin Cacchio, RN, CCRP
Director of Research Services
Trevor Fleming
Director of Technical Services
Kasey Heilman
Director of Development
Jenna B. Hobkirk, BS
Director of Administrative Services
Kevin Kirby, CMD, RT (R)(T)
Director of Clinical Dosimetry
Christina Mershell
Business Development Coordinator
Holly Mostoller, PHR SHRM-CP
Director of Human Resources
Darci Peistrup
Director of Billing Services
Bradlee Robbert, FACHE, MHA, RT (R)(T)
Director of Operations
Amy Sapp, MSN, RN
Director of Pediatric Nursing
Abby Senterfitt, BSN, RN
Director of Adult Nursing Services
Jason Smith
Director of Facilities
Tamara Sorrye, LMHC-QS
Director of Social Services
Lisa Ward
Patient Intake Director
Executive Team
Kristin A. Heath, DBA, MBA, MHA
Executive Director
Nancy Price Mendenhall, MD, FACR, FASTRO
Medical Director
Perry Johnson, PhD
Director of Physics
Physicians
Julie A. Bradley, MD, MHCDS
Physician
Curtis Bryant, MD, MPH
Physician
Roi Dagan, MD, MS
Physician
Daniel J. Indelicato, MD
Physician
Samuel Jean-Baptiste, MD, MS
Physician
Raymond B. Mailhot, MD, MPH
Physician
William M. Mendenhall, MD, FACR
Physician
Romaine Charles Nichols, Jr., MD
Physician
Paul Okunieff, MD
Physician
Nurse Practitioners
Teena Burchianti, MSN, APRN, ANP-BC, OCN®
Radiation Oncology Nurse Practitioner
Kerri Copeland Jarrell, APRN
Radiation Oncology Nurse Practitioner
Toni Ruffino, APRN
Radiation Oncology Nurse Practitioner
Physicists
Mark Artz, PhD, MBA
Physicist
Hardev Singh Grewal, PhD
Physicist
Soon Huh, PhD
Physicist
Maria Mamalui, PhD
Physicist
Jiyeon Park, PhD
Physicist
Mohammad Saki, DSc PhD
Physicist
Emma Viviers, MSc
Physicist
Twyla Willoughby, PhD, FAAPM
Physicist
Yawei Zhang, PhD
Physicist
Support Staff
Walt Moore
Chief Financial Officer
Tim Buist
Director of IT
Robin Cacchio, RN, CCRP
Director of Research Services
Trevor Fleming
Director of Technical Services
Kasey Heilman
Director of Development
Jenna B. Hobkirk, BS
Director of Administrative Services
Kevin Kirby, CMD, RT (R)(T)
Director of Clinical Dosimetry
Christina Mershell
Business Development Coordinator
Holly Mostoller, PHR SHRM-CP
Director of Human Resources
Darci Peistrup
Director of Billing Services
Bradlee Robbert, FACHE, MHA, RT (R)(T)
Director of Operations
Amy Sapp, MSN, RN
Director of Pediatric Nursing
Abby Senterfitt, BSN, RN
Director of Adult Nursing Services
Jason Smith
Director of Facilities
Tamara Sorrye, LMHC-QS
Director of Social Services
Lisa Ward
Patient Intake Director
