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Chair's Message

Gregg Marshall, Ph.D., RRT, RPSGT, RST, RCP


Welcome to the exciting world of Respiratory Care and Polysomnography! The Department of Respiratory Care at Texas State University with 7 fulltime faculty and 12 adjunct clinical faculty. Our goal is to assist you in successful becoming credentialed as a Registered Respiratory Therapist (RRT), a Registered Polysomnographic Technologist (RPSGT), or a Sleep Disorders Specialist (SDS).

The Graduate Certificate in Polysomnographic Technology is a 15-hour program offered each fall & spring to qualify individual with a bachelor's degree and a credential in healthcare.  Students completing the certificate are immediately eligible to sit for and the BRPT Registered Polysomnographic Technologist (RPSGT) national board exam  and if the student is CRT/RRT, he/she is eligible to also sit for the NBRC Sleep Disorder Specialist (SDS) national specialty exam. Students who are admitted to the Master of Science in Interdisciplinary Studies (MSIS) degree program may request the15 graduate PSG hours be credited toward the MSIS degree completion at Texas State.

I invite you to visit the other areas of our website, our department and our accredited sleep center on the Texas State campus in pursuit of your interest for a promising career in respiratory care or polysomngraphy. The Texas State University Respiratory Care Program offering the Bachelor of Science in Respiratory Care degree and the Polysomnography Option Program at the San Marcos, Texas campus is accredited by the Commission on Accreditation for Respiratory Care (

Commission on Accreditation for Respiratory Care (CoARC)

1248 Harwood Road

Bedford, Texas 76021-4244

(817) 283-2835

Dr. Marshall has taught at Texas State in the Department of Respiratory Care since 1980 and became the chair in 2003. He can be reached at (512)245-8243 or at