Employee-owned since 1891, O-A-K offers commercial construction services to clients in Michigan, Florida, and Colorado. We specialize in community-driven projects and offer an inclusive and intentional experience. We focus on Construction Management contract delivery within seven distinct industries, including K12, Higher Education, Commercial, Community, Government, Healthcare, and Aviation. Corporate office locations: • Grand Rapids, Michigan • Kalamazoo, Michigan • Fort Myers, Florida • Naples, Florida • Castle Rock, Colorado