About the GI Alliance Research Team

Our GI Alliance Research Team is comprised of individuals motivated to do what is best for our patients and lead a highly skilled team to address your specific needs.

Timothy Ritter, MD

Timothy Ritter, MD

Gastroenterologist

Senior Medical Research Director

Harry Sarles, MD

Harry Sarles, MD

Gastroenterologist

Senior Associate Medical Director

Chirag Trivedi, DO

Chirag Trivedi, DO

Gastroenterologist

Regional Medical Director

Jonathan Rosenberg, MD<

Jonathan Rosenberg, MD

Gastroenterologist

Regional Medical Director

George Catinis, MD

George Catinis, MD

Gastroenterologist

Education Program Director

Matthew Burkemper

Matthew Burkemper

Senior Research Director

Nicole Rodriguez

Nicole Rodriguez

Program Coordinator

Sadiat Ibrahim, MD

Sadiat Ibrahim, MD

Director of Clinical Operations

Vanessa Galvan

Vanessa Galvan

Director of Clinical Operations

Melinda Dollar-Wilson

Melinda Dollar-Wilson

Director of QA/QC

Brooke Hodnick, PA

Brooke Hodnick, PA

Chronic Care Manager

Rosanna Vazquez

Rosanna Vazquez

Director of Finance

Milhen James

Milhen James

Contracts Manager

Amanda Hatley

Amanda Hatley

Education Coordinator

Jo Ann Gilbert

Jo Ann Gilbert

Regulatory Manager