Sealaska Constructors LLC

Sealaska Constructors LLC, a subsidiary of Sealaska Corporation (a Tlingit, Haida, and Tsimshian Alaska Native Corporation), is a minority-owned, self-certified small disadvantaged business and Indian Economic Enterprise that delivers commercial and institutional building construction, renovation, design-build, and facility infrastructure services to the federal government as a prime contractor across 29 customer agencies. The firm operates from Seattle, Washington, competing under Indian Small Business Economic Enterprise, Total Small Business, and full-and-open set-asides, with the Indian Small Business Economic Enterprise designation predominating across its largest dollar vehicles.

Sealaska Constructors holds five major indefinite-delivery contracts anchoring its federal work: a $1.5 billion Department of the Interior Construction Multiple Award Contract (DOI C-MAC 2023-2028) set aside for Indian Small Business Economic Enterprises, extending through May 2028; a $250 million Fish and Wildlife Service Region 9 multiple-award IDIQ for alteration, repair, and construction services across the Continental United States and Hawaii, extending through June 2027; a $95 million Army Corps of Engineers Seattle District contract for design-build and design-bid-build projects in the Pacific Northwest, extending through February 2028; a $50 million Air National Guard multiple-award IDIQ under Total Small Business set-aside, extending through November 2029; and a $40 million Bureau of Indian Affairs Western Region Construction MATOC, extending through March 2027. Recent signature work includes a $73 million design-build delivery order for Tonalea Day School in Arizona (DOI C-MAC, completion June 2028), an $11 million HVAC replacement at Haskell Indian Nations University's Building 122 (Ross Hall) in Lawrence, Kansas (completion July 2024), an $8.48 million plumbing work order for Warm Springs Detention Center Rehabilitation Center in Oregon (completion May 2026), and a $10.4 million HVAC repair delivery order at Lewis-McChord, Washington (completion October 2026).

Customer concentration is pronounced and highly skewed toward interior construction. The Department of the Interior Bureau of Indian Affairs Central Office dominates across both dimensions: 30 awards with $2.31 billion combined potential value, representing 24% of all 124 awards and 70% of the $3.3 billion combined potential value in the portfolio. The Bureau of Indian Education accounts for 24 awards with $63.2 million combined potential value. Beyond Interior, the Air Force Space Command contributes 8 awards with $291.6 million combined potential value (primarily Vandenberg Space Force Base facility rehabilitation and infrastructure work). The Air National Guard holds 15 awards with $96.4 million combined potential value. The Army Corps of Engineers Seattle District and Fort Worth District contribute 12 awards with $140 million combined potential value. The disparity between award count and dollar rankings surfaces in the potential-value ranking: the Fish and Wildlife Service Region 9 IDIQ alone carries $250 million (one award) while generating minimal task-order activity in recent years compared to the high-volume BIA interior construction pipeline.

The portfolio shows declining recent award velocity — 19 awards in 2022, 16 in 2023, 8 in 2024, 10 in 2025, and 4 in 2026 — with eleven awards (combined potential value $114.3 million) reaching ultimate completion within the next twenty-four months and facing recompete risk. The firm operates entirely as a prime contractor (100% of 124 awards); no sub-award activity appears in the source.

Service Contract Inventory data captures a subset of Sealaska Constructors' federal work above the $150,000 reporting threshold and excludes goods and construction (which dominate the firm's portfolio). Across 95 SCI-reportable prime records from FY2022 through FY2025, the vendor invoiced $72.3 million: $20.6 million in FY2022 across 12.6 FTEs, $24.9 million in FY2023 across 8.0 FTEs, zero in FY2024, and $26.8 million in FY2025 across 11.7 FTEs. Median government-paid hourly rates on SCI contracts ran around $378/hr, with senior rates reaching the $1.3 thousand/hr range at the 90th percentile. Across SCI-reportable prime contracts, subcontractors performed 13% of total hours on average, with 37 named subcontractors reported; this reflects Sealaska's use of specialized MEP (mechanical, electrical, plumbing), architectural-engineering, and site-preparation subs on its construction delivery orders, though the firm self-performs substantial work.

The primary NAICS code is 236220 (Commercial and Institutional Building Construction), reflecting 105 of 124 awards. Secondary codes include 237320 (Other Heavy and Civil Engineering Construction), 238220 (Plumbing, Heating, and Air-Conditioning Contractors), and 237110 (Water and Sewer Line Construction). Top PSC codes are Construction of Miscellaneous Buildings (26 awards) and Repair or Alteration of Other Administrative Facilities and Service Buildings (20 awards). Place of performance spans the western United States, with concentrated activity in Arizona, Kansas, Montana, Oregon, Washington, and South Dakota — predominantly at Bureau of Indian Affairs and Bureau of Indian Education facilities, Fish and Wildlife Service installations, and Air Force Space Force bases. The firm's Alaska Native Corporation ownership and Indian Economic Enterprise status position it as a preferred contractor for tribal and Indian Country facility development, a posture reflected in the heavy Interior concentration and the recurring use of Indian Small Business Economic Enterprise set-asides.

SeaCon is a multidisciplinary General Contractor specializing in Federal Contracting programs throughout the United States. We operate three business units: Heavy Civil Construction, Vertical Design/Build, and Environmental Services.