President, TSSP
Gregory A. Holt, PhD RRT FAASM
Diplomate, American Board of Sleep Medicine

Dr Gregory Holt is the Director of Operations and Polysomnography for Respiratory Quality Services (RQS) in Houston, TX. Dr Holt has been trained as a respiratory therapist at LSU Medical Center in Shreveport, LA. He’s worked in the acute care setting on code teams, ventilator management, labor & delivery and hyperbaric medicine. He has administrative experience as the Asst. Director of Respiratory Care at E.A. Conway Memorial Hospital, Monroe, LA., Director of Pulmonary Diagnostic Testing at Temple University Hospital, Philadelphia, PA., and Program Director of Respiratory Care, Florida A&M University. He completed his education at the University of Florida’s College of Medicine, earning a Doctorate in Physiology in 1992 while studying Respiratory Muscle Afferent Signal Processing. He has been involved in clinical sleep medicine for 25 years prior to his arrival at RQS. Dr. Holt participated in the initiation of the Sleep Diagnostic Laboratory at Temple University Hospital in 1992. He was Board Certified as a Clinical Sleep Specialist by the American Board of Sleep Medicine in 2005 and since has helped thousands of patients with sleep/wake disorders. Dr. Holt has been the Medical Director of sleep clinics in Florida, he’s held joint appointments with UT Medicine, Pulmonary Medicine at Temple University Hospital, Pulmonary Medicine at the Audie Murphy Memorial VA Hospital and the Sleep Therapy & Research Institute in San Antonio. Dr. Holt continues his interests in clinical patient care and remains active as a Respiratory Therapist at the South Texas ALS Clinic and the Houston Methodist ALS Clinic. He has been involved with Veteran’s Health while working as a Certified Hyperbaric Technologist and diving with patients suffering from traumatic brain injury. His research interests are in the control of breathing, diagnostic testing in the ALS population and sleep medicine. Dr. Holt has published a number of peer reviewed articles and several book chapters in the field. His most recent publication is a book chapter on the Principles of Mechanical Ventilation (Shelledy & Peters, eds., 2019). Currently, Dr. Holt serves as a member of the HME-RT Council, American Association for Homecare, an item writer for the National Board of Respiratory Care and President of the Texas Society of Sleep Professionals. He continues to work with the ALS Association, local support and community groups while enjoying participating in ALS sponsored events. He is an avid motorcycle enthusiast, enjoys sailing, diving, hunting & fishing. Dr Holt is married and has 5 children which he jokes about, pointing to his interest as a long-distance motorcyclist.

Cindy Jon M.D., TSSP
Vice President
Dr. Jon is a pediatric pulmonologist and sleep specialist who treats children with various respiratory and sleep disorders. I trained at the University of Texas (UT) – Houston Health Science Center for medical school, residency and fellowship. After she finished her fellowship in 2007, she joined the faculty at UT – Houston McGovern Medical School. Since then, her role has expanded to the Associate Program director of the Pediatric Pulmonary fellowship and Medical Director of the Pediatric Sleep Center at Memorial Hermann Memorial City in Houston. Currently, her focus is to develop a comprehensive pediatric sleep medicine program at UT

Mir Medhi RPSGT

“Mir Ali Mehdi is a Registered Polysomnographic Technologist who has been in the field of sleep medicine for the last 19 years. He was introduced to the this amazing field through a psychology project while pursuing his Bachelor of Science degree. After completing his degree he continued to work as a night technologist and later moved to the day shift.  He loves to stay informed and keep a hands on approach and still loves working a few nights a month.  He has worked in Toronto Canada and currently has been working in the Capacity of a Chief Technologist in the Houston area for the last 10 years.”



Eva Alegria BS RRT, RPSGT
TSSP Secretary
Eva Alegria began her career in Respiratory Therapy over 18 years ago. She has worked in many clinical areas including respiratory management. As a manager, she assisted in the planning and development of the sleep center for St Luke’s Patients Medical. Eva has assisted in accreditation and the reaccreditation process.  She is the sleep educator for Baylor St Luke’s PAP clinic. She has become a key point person in managing and preparing authorizations for sleep patients. While working in the PAP clinic, she has developed techniques in the mask fitting and education process that aim toward higher compliance for struggling PAP users.  Eva is currently consulting in the authorization process as she continues to share information she has acquired to assist others to minimize denials. She continues to share her knowledge with others to help patients overcome obstacles surrounding their mask and machine. She also currently serves as a board member for TSSP.