Edmond, Oklahoma - Dr. Singleton DeWayne "Wayne" McMullan of Edmond, Oklahoma passed away on August 15, 2025, after a long battle with cancer.

Wayne retired from the US Public Health Service where he was a mental health professional and administrator for twenty-five years. Following that he established a private consulting firm and provided consultations to numerous Indian Tribes throughout the country, on the development of substance abuse treatment programs.

Dr. McMullan was a member of the First United Methodist Church in Edmond, Oklahoma. Through his years he had numerous leadership positions in the church as well as civic groups. He also volunteered as a youth baseball coach and scout leader for many years.

He is survived by his wife of 58 years, Elizabeth "Liz" McMullan, a son, Tim McMullan (Stacy) of Shawnee, Oklahoma, a daughter, Susan Ledgerwood (Dan) of Cushing, Oklahoma, a sister, Sue Tennyson (Ken) of Katy, Texas, sister-in-law Ellen McMullan of Mobile, Alabama, 3 grandchildren, and 7 great grandchildren.

He was preceded in death by his sister, Shirley Hackman, brother-in-law, Russell Hackman, brother Larry McMullan, and his parents, Singleton and Mary Lou McMullan.

A memorial service will be held at First United Methodist Church in Edmond, Oklahoma on August 30, 2025, beginning at 10:00am.

Wayne suggested in lieu of flowers, donations be made to St. Jude Children's Research Hospital or to Doctors Without Borders, USA.