Judge Foster was appointed to the Circuit Court bench on April 26, 2006 by Governor Jennifer M. Granholm. Prior to that, Judge Foster was a District Judge at the 41-B District Court, serving Mount Clemens and the Townships of Clinton and Harrison, for 15 years. He received his B.A. from Alma College, where he currently serves as a member of the Board of Trustees. He received his J.D. from the Detroit College of Law in 1977. Besides private practice, Judge Foster was Assistant, then Corporation Counsel for Macomb County until his appointment to the District Court Bench by Governor James J. Blanchard in November, 1990.

Judge Foster has been active in many community organizations, including the Salvation Army's Mt. Clemens Citadel, Clinton Township Optimists Club, Big Brothers/Big Sisters, Metro Detroit Alzheimer's Association, and is a Board Member at Peace Presbyterian Village in Clinton Township.

He and his wife, Kathy Keves-Foster, have been residents of Macomb County for over 25 years. Together, they own and operate American Elite Alpacas, an alpaca breeding farm in St. Clair, Michigan.