Our Team

Our Team


Jeff Bullock,


Jeff Bullock, M.D. completed his undergraduate work at Texas A&M, and went on to achieve his Medical Doctorate at Texas Tech School of Medicine. It was during the early parts of his medical training as an intern, resident, and fellow at Parkland Memorial Hospital in Dallas, that he discovered his passion for gastroenterology. He recalls, “It is one of the few fields [of medicine] where there is a good mix of science and people—a deeper level of thinking, interacting with patients, and performing procedures.”

During his career, Dr. Bullock has applied his expertise to other facets of art and science. He contributes as a medical columnist for The Boerne Star—winning the Anson Jones Award for excellence in health reporting in 2015.


Mireya Garza,

Director of Clinical Research

Mireya Garza is the Director of Clinical Research as well as being the Chief Operating Officer for the Southern Star Research Institute, LLC. She brings nearly 30 years of expertise to bare on her role every day. Her attention to detail and general know-how on all things related to clinical trials, makes our company run in a timely and efficient manner. She has been nationally recognized as an industry leader and her input is often sought after as pharmaceuticals companies are designing trials. She better than anyone, can determine the needs of a patient and make sure they are taken care of. She also sits on the CRC Advisory Board at Northwest Vista College.


Erika Trevino,

Clinical Research Coordinator

Erika Trevino handles most of our Crohn's and Colitis trials. Over her past 8 years of experience as a clinical research coordinator, she has developed amazing expertise in guiding and managing patients with these difficult diseases. Her tireless effort is often recognized by her patients, who have commented that they wish they could keep Erika, even when they are not in a trial.


Rebecca Delagarza,

Clinical Research Coordinator

Rebecca Delagarza has 7 years’ experience as a clinical research coordinator. Her patients love her positive attitude. However, she is mostly known for going the extra mile on behalf of her patients. She is tenacious in getting what her patients need, period.


Lisa Romanski,


Lisa Romanski brings her life and death skills as an ER nurse to a much more laid back environment as our infusion nurse. Her gentle demeanor with the patients is calming. Her expertise in stating iv's is second to none. We are lucky to have such an overqualified person supervising our infusions.