Rose Mary Lopez began her EMS career after graduating from TIMER in 1995. She immediately began her internship with TIMER as an instructor, and in 1996 became a Certified Lab Instructor. Rose Mary took over as an Administrator in 1997. Rose Mary worked as an EMT with the Alcohol Crisis Center at Bayley Seton Hospital.

She has worked at Richmond University Medical Center, Staten Island University, and Maimonides Medical Center as an EMT and then as a Paramedic. She became a Paramedic in 2005. In 1998, Rose Mary successfully completed the course to become a Certified Instructor Coordinator. She is currently the Skills Coordinator and the Administrative Director at TIMER.