Dr. Thurman is or has been an active member of:

• Actors Equity Association (AEA) (inactive) 
• American Association for the Advancement of Science (AAAS) 
• American Choral Directors Association (ACDA) and ACDA of Minnesota
• American Federation of Television and Radio Artists (AFTRA) (inactive)
• American Guild of Musical Artists (AGMA) (inactive)
• Association for Prenatal and Perinatal Psychology and Health (APPPAH) (inactive)
• Association for Supervision and Curriculum Development (ASCD)
• European Society for Cognitive Sciences of Music (ESCOM) (inactive)
• International Society for Music Education (ISME) (inactive)
• National Association for Music Education (NAME) and Minnesota Music Educators Association (MMEA)
• Music Teachers National Association (MTNA) and Minnesota Music Teachers Association (MMTA) (inactive)
• National Association of Teachers of Singing (NATS) and Minnesota Chapter of NATS
• New York Academy of Sciences (NYAS)
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• Pan-American Vocology Association (PAVA)
• Phi Delta Kappa International (PDK)
• Voice and Speech Trainers Association (VASTA) (inactive)
• The VoiceCare Network [Founder, Faculty, Board of Directors Member, Executive Director, (Now Retired)]

 Leon's Curriculum Vita