Faculty Profiles

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Dr. S Gregory Marshall

  • Professor - Department of Respiratory Care
Portrait of Dr. S Gregory Marshall

Biography and education

Full time faculty since 1980 and chair from 2003-2025. Doctorate from University of Texas in Education (1994), Master's degree from Texas State University in Healthcare Administration and Allied Health Education (1983) and bachelor's degree from Baylor University in Biology (1975). Associate degree in Respiratory Therapy from Texas State University in 1978.
  • Christopher, Russian J (Principal), Percent Contribution: %25, Sam Gregory (Co-Principal), Percent Contribution: %25, Waugh, Jonathan (Supporting), Percent Contribution: %25, Dunlevy, Crystal, Percent Contribution: %25. Critical Thinking and Clinical Judgement Skills in Recent Graduates of Associate Degree and Baccalaureate Degree Programs, American Association for Respiratory Care, Private / Foundation / Corporate, $48950. (Funded: October 1, 2018 - September 30, 2019). Grant.
  • Marshall, Sam Gregory. Texas State Athlete Sleep Wellness Program — Development Grant, $10000.00. (Funded: 2007). Grant.
  • Marshall, Sam Gregory. Texas State Athlete Sleep Wellness Program — Development Grant, $13500.00. (Funded: 2006). Grant.
  • Marshall, Sam Gregory. Texas State Football Sleep Wellness Program, Respironics Phillips Corp., $23772.50. (Funded: 2006). Grant.
  • Marshall, Sam Gregory. Respironics Phillips Corp., Texas State Football Sleep Wellness Program, $9985.00. (Funded: 2006). Grant.
View all grants
  • Marshall, S. G. (2025). Regulation of Breathing. In Egan’s Fundamentals of Respiratory Care (13th ed). St. Louis, MO, USA: Elsevier.
  • Marshall, S. G. (n.d.). Physiology of Sleep Disordered Breathing. In Respiratory Care Anatomy and Physiology: Foundations for Clinical Practice (pp. 247–266). St. Louis, MO, USA: Elsevier.
  • Johnson, M. L., Marshall, S. G., Kelemen, W. L., & Westerberg, C. E. (2019). The effects of a single night of continuous positive airway pressure on memory in patients with obstructive sleep apnea. Sleep, 42(A33).
  • Marshall, S. G. (2017). Physiology of Sleep Disordered Breathing. In Respiratory Care Anatomy and Physiology. Philadelphia, PA, USA: Mosby/Elsevier.
  • Marshall, S. G., Henry, R. H., & Russian, C. J. (2016). Right versus left prong nasal cannula flow rate delivery and the effects of nasal cycling on inspired F102 in an adult anatomic model. Journal of Respiratory Care, 61, 397–404. https://doi.org/10.4187/respcare.04169
View all scholarly/creative works
  • Award / Honor Nominee: Service Excellence Award, College of Health Professions. 2016
  • Award / Honor Recipient: Dedication of Service Award, Texas Society for Sleep Professionals. October 2015
  • Award / Honor Recipient: Texas State University Service Award for "Thirty-five Years of Service". September 1, 2015
  • Award / Honor Nominee: Teaching Excellence Award, College of Health Professions. 2013
  • Award / Honor Recipient: Alpha Chi National Honor Society Favorite Professor Award, Alfred H. Nolle Chapter, Texas State University. 2011
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  1. Texas Medical Board -- Texas Board for Respiratory Care

  2. Other

    Department of Physical Therapy

  3. Round Rock Chamber of Commerce Annual Awards Banquet

  4. Vice President

    Coalition for Baccalaureate & Graduate Respiratory Therapy Education, Executive Board of Directors

  5. Member

    Virginia Academy of Sleep Medicine

  6. Other

    Coalition for Baccalaureate & Graudate Respiratory Therapy Education

  7. View all activities