M. A. Mortenson Company (Mortenson) is a family-owned US builder, developer and engineering services provider headquartered in Minneapolis, Minnesota, founded in 1954 by Mort Mortenson. It serves the commercial, institutional and energy sectors, including sports venues, data centers and solar and wind projects, through 12 regional offices, with about $10 billion in 2025 revenue and more than 10,000 team members. Derek Cunz has been President and CEO since January 2025.