CastleRock Construction LLC is the newest company founded by Mitchell Ryan von Koenig (kay-nig). Mitch has built and ran two successful construction oriented companies prior to CastleRock, StoneArch Construction and Koenig Construction Services, INC (formerly, Koenig Marketing Group). With his experience with both the General Contracting and Sub-Contracting aspects of construction, CastleRock has positioned itself to become a leader in the construction industry. We look forward to establishing a strong, morally sound standard for construction services throughout the midwest.

Mitch graduated from the University of Minnesota - Twin Cities, with a B.S. degree in Genetics and Molecular Biology. While attending school, he cut his teeth in the construction industry and incorporated his first company, Koenig Marketing Group, which has since been changed to Koenig Construction Services (KCG). The company provided sales consulting and team building for residential remodelers. Since it's foundation, KCG has expanded it's role in the construction industry to include estimating, completing insurance claim documentation/supplementation, and providing labor (sub-contracting) to General Contractors.