September 17, 1936 – September 14, 2026

John Michael Thomas passed away peacefully on September 14, 2026, just three days before his 90th birthday. He was surrounded by his children, a fitting farewell for a man whose family meant so much to him.

John was preceded in death by his beloved wife of 67 years, Patsy C. Thomas, who passed away on July 14, 2024. John and Patsy were married on July 19, 1957, and shared a lifetime of love, family, faith, and adventure. He was also preceded in death by his parents, Vlady and Laura Thomas, and his brother, Dave Thomas, and sister-in-law, Anne Thomas. 

John was a dedicated scholar and accomplished researcher, and educator. He earned his bachelor’s degree from California Polytechnic State University (Cal Poly), his master’s degree from Washington State University (WSU), and his Ph.D. from University of Arizona. He also proudly served in the United States Navy Reserves for eight years.

John spent more than 30 years working at Pacific Northwest National Laboratory, where he contributed to numerous research projects and authored many research journal papers before retiring. In addition to his research career, he shared his knowledge and passion for learning as an Adjunct Professor at the Joint Center for Graduate Studies and Washington State University in Richland, Washington. His career reflected his lifelong curiosity, commitment to education, and dedication to advancing knowledge.

While John took great pride in his professional accomplishments, some of his most meaningful experiences came through the shared ministry and mission work he and Patsy pursued around the world. They were especially proud of their many trips to Africa, where they helped build churches, schools, and hospitals and taught at Christian colleges. Their work took them to Nigeria, Namibia, Zimbabwe, and Kenya, all with the purpose of sharing their Christian faith and bringing people to Christ. These experiences were an important part of their lives together and reflected their deep commitment to serving others.

Above all, John cherished his family. He is survived by his three children and their spouses:

● Patricia (Shelly) Fangman (Andy)

● Sheryl Cooke Youngdahl (Erik)

● Steve Thomas (Tami)

He was a proud grandfather to nine grandchildren:

● AJ Fangman

● Christina Fangman

● Jennifer Wise (Cody)

● Baylee Cooke

● Mollie Fowler (Miles)

● Kellen Cooke

● Kadi Langley (Truman)

● Jordon Thomas (Hannah)

● Austin Thomas

He also leaves behind four great-grandchildren, Mason, Myka, Camron, and Brayden, who brought another generation of joy to his family.

John’s life was defined by his love of family, his dedication to education and research, and his unwavering faith. Alongside Patsy, he built a legacy that reached far beyond their home and touched lives around the world. His influence will live on through the family he loved, the work he accomplished, the people he served, and the faith he shared.

He will be deeply missed and lovingly remembered by all who knew him.