McMahon, Inc. is a contracting firm specializing in delivering complete design / build services covering a broad spectrum of project types, sizes, budgets, schedules, locations and risks.  McMahon, Inc. is a Wisconsin based corporation, founded by the principal engineers, architects and shareholders of McMahon.  The two firms contract directly with each other to provide designer-led design / build or complete engineer-procure-construct (EPC) projects.

McMahon, Inc. is a member of the Associated Builders & Contractors (A.B.C.) and
the Design-Build Institute of America (D.B.I.A.).