Dr. Thodas serves on the Board of Directors of the Pacific Dental Education Foundation, University of the Pacific. He is the chairperson and co-curator of the Institute of Dental History and Craniofacial Study. He also serves as a dental consultant to Skyline College. He is a trustee of the Frances and John Wahl Charitable Foundation.

Dr. Thodas is an active member of the American Dental Association, the California Dental Association, the San Mateo County Dental Society, the American Academy of the History of Dentistry, the American Academy of Cosmetic Dentistry, and the Academy of Laser Dentistry.