Sean McNab

Sean McNab serves as a key procurement professional within the W072 Endist Chicago office of the U.S. Army Corps of Engineers, supporting the Department of Defense’s civil infrastructure mission. He manages the acquisition of complex civil works projects essential to military readiness, including water control systems, harbor facilities, erosion control structures, and related engineering services. His portfolio centers on large-scale construction and environmental remediation contracts governed by FAR Part 36, ensuring compliance with federal standards for public works and infrastructure resilience. McNab’s work directly enables operational continuity by securing critical civil engineering capabilities that safeguard military installations and surrounding communities from environmental hazards. McNab maintains consistent partnerships with a core group of specialized contractors, notably MORRISH-WALLACE CONSTRUCTION, INC. and Boh Environmental, L.L.C., both of which provide high-capacity civil engineering and environmental remediation services. His contracting patterns reflect a preference for experienced, technically proficient vendors with demonstrated expertise in heavy construction and ecological compliance. These relationships are built on long-term performance reliability and adherence to stringent federal environmental and safety regulations, fostering a collaborative yet rigorously monitored vendor ecosystem. McNab demonstrates a strong commitment to socioeconomic contracting, with over 78% of his awards structured as small business set-asides under FAR 19.5, including a significant 21.1% allocation to HUBZone firms. His procurement strategy prioritizes broad small business participation, consistently leveraging set-aside authorities to expand opportunities for disadvantaged and geographically targeted vendors while maintaining competitive integrity and mission readiness. His primary procurement focus lies in NAICS 237990 (Other Heavy and Civil Engineering Construction) and 237110 (Water and Sewer Line Construction), reflecting deep expertise in hydraulic structures, flood risk mitigation, and infrastructure rehabilitation. He also regularly procures landscaping services (NAICS 561730) and professional technical services (NAICS 541990) to support site restoration and engineering design, underscoring his holistic approach to civil works project delivery.