Dr. Shelledy has served as a professor, respiratory care program director and respiratory care academic department chairman for over 25 years. He has taught patient assessment, both at the bedside and in the classroom to respiratory care students at St. Petersburg College, Georgia State University, Athens Technical College, Rush University, University of Arkansas for Medical Sciences, and the University of Texas Health Science Center at San Antonio. He currently holds appointment as Professor and Dean, School of Health Professions at The University of Texas Health Science Center, San Antonio, Texas.