All El Centro campuses will be closed on Monday, September 7 in observance of Labor Day.

Lisa Lock, M.B.A., B.S.M.T., MT(ASCP)BB, CLS(NCA)

Program Coordinator and Faculty

Lisa Lock has served as the director of the Medical Laboratory Technology program since 1997. She worked as a medical laboratory technologist in blood banking and hematology for seven years and in a laboratory administrative role for eight years. She holds a bachelor’s degree in medical technology from Louisiana State University in Baton Rouge (Geaux Tigers!) and a Master of Business Administration degree from Amberton University.


Denise Griffin, M.H.S., MT(ASCP)SBB

Adjunct Faculty

Denise Griffin earned her bachelor’s degree in medical technology from Southeastern Louisiana University in Hammond, La., and her master’s degree in health sciences from LSU Health Sciences Center in New Orleans. She began her teaching career at Children’s Hospital in New Orleans as the clinical coordinator for medical technology students and received her specialization in blood banking from Charity Hospital there.

She taught in the medical laboratory technician program at New Orleans’ Delgado Community College for four years before moving to Dallas, where she began teaching as an adjunct faculty member at El Centro in January 2006. She teaches courses for Medical Lab Technology as well as Health Occupations Core Curriculum courses for El Centro’s nursing and allied health programs.


John Wentz, M.S., CLS(NCA), MT(ASCP)

Adjunct Faculty

John Wentz is a faculty member with the Department of Clinical Laboratory Sciences at the University of Texas Medical Branch in Galveston and the Medical Laboratory Technology program at El Centro College. He facilitates the UTMB distance education program in the North Texas area for medical laboratory technicians who are pursuing a Bachelor of Science degree in clinical laboratory science.

John has been a medical laboratory scientist since 1993 and involved in laboratory education since 1997. He earned his Master of Science degree from Texas Woman’s University, a Bachelor of Science degree from UT Southwestern School of Allied Health Sciences and an Associate in Applied Sciences degree from Mountain View College. (Another DCCCD success story!) John has lived in southwest Dallas County since 1973.