Memorial Day Holiday - Monday, May 30: All buildings and locations of El Centro College will be closed. We will reopen Tuesday, May 31.

Medical Assisting »


Sandra Alexander, MPA, BAS, CMA (AAMA)

Program Director and Faculty
El Centro College

Originally from Cleveland, Ohio, Sandra Alexander has lived in the Dallas area since 1985. She became the director of the Medical Assisting program at El Centro College in the fall of 2009.

Employed in the medical field since 1965, she most recently worked as a certified medical assistant (CMA, AAMA) for Arco Oil and Gas Co. and as a CMA office manager with the Dallas Diagnostic Association.

She has served as adjunct faculty for Richland College allied health professions since 1999.

Sandra holds a Master and Bachelor of Arts and Science degrees in healthcare administration from Grand Canyon and Dallas Baptist University and is credentialed as a CMA through the American Association of Medical Assistants.

Steven Carter, M.S.

Adjunct Faculty

Steven Carter holds a bachelor’s degree in psychology and a master’s degree in rehabilitation counseling psychology from Texas Tech University. He has published numerous articles in professional journals and has conducted research in areas related to disability and rehabilitation.

Having taught many years in the field of vocational rehabilitation psychology, he has also served as a vocational disability expert in court cases in eight states and has served as an expert on Social Security disability appeals. He has taught anatomy and physiology, vocational rehabilitation, medical and psychological aspects of disability, pathophysiology and psychology-related coursework at the college level since 1984.

He is the coordinator of workforce and continuing education programs at El Centro College and a private practitioner in vocational evaluation at Career Assessment Services in Dallas, where he continues to do vocational evaluations for selected cases.

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

Adjunct 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.


Adjunct Faculty

For details about graduation rates, program costs and other important information, view the gainful employment disclosure.