MCMILLEN, INC.

MCMILLEN, INC. specializes in heavy civil engineering construction and professional engineering services for federal infrastructure projects, with deep expertise in navigation system upgrades, lock and dam modifications, and water resource infrastructure. The contractor delivers complex civil works including bulkhead recess installations, stoplog conversions, dewatering operations, and machinery replacements for navigation structures along the Mississippi River and McClellan-Kerr Arkansas River Navigation System. Their engineering services encompass feasibility studies, life safety upgrades, and design support for critical water control infrastructure, demonstrating proficiency in structural engineering, hydraulic systems, and construction management for federally owned assets. Technical capabilities include precision machining for lock components, power and control system integration for navigation locks, and coordination of multi-phase construction under stringent federal environmental and safety standards. The company maintains a consistent presence with the Department of Defense, particularly on U.S. Army Corps of Engineers projects involving flood control, navigation, and water resource infrastructure. They also deliver work for the Department of the Interior, including pumping station construction and aquatic infrastructure upgrades, indicating a strong alignment with federal water management and environmental stewardship missions. Their relationship with these agencies reflects a pattern of repeat engagement on technically demanding, mission-critical civil works. MCMILLEN, INC. is primarily focused on NAICS 237990 (Other Heavy and Civil Engineering Construction) and 541330 (Engineering Services), positioning them as a niche provider for complex water infrastructure modernization. Their vertical specialization lies in lock and dam systems, hydraulic structures, and associated mechanical and electrical integration for navigation and flood control assets. As a small business structured as a 2L entity based in Boise, Idaho, MCMILLEN, INC. operates without federal certifications but maintains a focused geographic and market presence centered on federal civil works procurement. Their operational footprint is defined by project execution across the central and southern United States, particularly in high-priority waterway corridors managed by federal agencies.