With 20 years of industry experience, Shelby has overseen all phases of multimillion-dollar construction projects, managing large teams in commercial construction. He has successfully completed high-profile projects across a range of sectors, including high-rise office buildings, faith-based projects, aviation, hospitality, mission-critical facilities, museums and cultural facilities, and manufacturing. 

His expertise spans preconstruction and construction services, cost-saving strategies, project budgeting, scheduling, and ensuring site safety.

In January of 2024, Shelby purchased CYMCOR shares from founder Don Hodges joining Don and Marc as Managing Partners. Currently Shelby focuses on the operations management of CYMCOR.