​In the late 1930s, Leon P. Clark began his career in the plant engineering department of the Oldsmobile Division of General Motors, where he managed many heavy industrial construction projects.   In 1946, Leon founded Clark Construction Company in Grand Ledge, MI. Clark Construction Company worked very closely with GM to convert the automaker s wartime production factories back into automotive plants. During that time, Leon moved Clark Construction from Grand Ledge to Lansing to be closer to GM. The company grew rapidly, developing into a solid general contractor serving the industrial, commercial, and institutional construction markets. 

Leon's reputation as a gentleman, honest businessman, and his relationship with customers and subcontractors laid the foundation that would allow Clark Construction Company to become one of the nation’s leading general contractors and construction managers. 

Leon P. Clark's family is very proud of his accomplishments and the legacy he left behind. Two of his eleven children continue the hard work and dedication to Clark Construction Company, which celebrated 60 years in 2006. Eight of his grandchildren continue his legacy in construction as well, with four at Clark Construction Company and four at Siwek Construction of Flint, Michigan.