Mark C. Colley, age 70 of Houston, Texas, formerly of Fairborn passed away May 15, 2026. He was born May 18, 1955 in Xenia, the son of the late Thomas and Joy (Toth) Colley. He was a 1973 graduate of Fairborn Baker High School and continued his education at The Ohio State University earning a Bachelor’s degree. Mark began his career at Lockheed Missiles and Space in California. He then was employed with the Space Shuttle Program for 32 years in Florida and Texas. He was an avid Buckeye’s fan and enjoyed spending time with friends having a cigar with good conversations.

Mark is survived by two brothers, Sean Colley (Kathy Chambers), Michael Colley; niece Heather Colley; longtime friend, Kim Kelsey; as well as extended family and friends. A private service will be held by the family.