Dr. Williams is in private practice in Seattle, WA. He is a member of the American Optometric Association, Washington Optometric Physicians, British Contact Lens Association, International Association of Contact Lens Educators, and Fellow of the International Academy of Orthokeratology. He serves on the Board of The American Academy of Orthokeratology and Myopia Control where he is Chairman of the Education Committee. He is an Advisory Board Member of the GPLI and Reviewer for Contact Lens and Anterior Eye, the journal of the British Contact Lens Asso. He also serves as Adjunct Assistant Professor for the University of Missouri St. Louis, College of Optometry and Western University of Health Sciences.