SEB Engineering Inc.

SEB Engineering Inc., doing business as Stewart Engineering Inc., operates as a total-small-business-set-aside prime contractor specializing in road, bridge, and transportation infrastructure construction for California federal lands agencies. The company, a for-profit Subchapter S corporation based in Redding, California, focuses exclusively on highway, street, and bridge construction work under NAICS 237310 and PSC codes Y1LB-P and Y1LD-W, with all seven recent prime awards concentrated in two customer agencies and no subcontractor business.

Customer concentration in SEB Engineering's footprint is extreme. The Federal Highway Administration accounts for all but one award — six awards worth a combined potential value of $328.7 million — while the National Park Service Pacific West Region holds a single $1.9 million award for bridge replacement at Redwood National and State Parks. The two rankings align completely, with FHWA dominating both volume and dollars. Representative work includes a $5.6 million firm fixed price delivery order awarded May 11, 2026, under the Expedited California Road and Bridge Construction 2026–2031 IDIQ for construction of Mendo Lake Road in Albion, California (ultimate completion December 22, 2026); a $5.5 million emergency relief delivery order on Cottonwood Road near Sonora under the California Road Construction MATOC, awarded July 1, 2025 and extended to July 17, 2026; and a $3.8 million road construction repair delivery order on Santa Clara Road in Arcadia, California, awarded August 15, 2024 under the same MATOC. SEB Engineering also holds a definitive contract for the North Fork Feather River Bridge replacement project (FHWA, $3.7 million, January 27, 2025 completion) and the Geneva Road bridges replacement at Redwood parks (NPS, $1.9 million, June 23, 2025 completion).

SEB Engineering's primary vehicle position sits on two FHWA indefinite-delivery contracts. The Expedited California Road and Bridge Construction 2026–2031 IDIQ, a $250 million multiple-award contract with a total-small-business set-aside running through January 20, 2031, has issued one task order to SEB Engineering ($5.6 million for Mendo Lake Road). The California Road Construction MATOC, a $60 million small-business-set-aside multiple-award vehicle running through December 2028, has generated two task orders ($9.3 million combined potential value). Only one award — the Mendo Lake Road delivery order — faces ultimate completion in the next twenty-four months, creating minimal recompete pressure.

Activity has been episodic. Three awards in 2023, one in 2024, one in 2025, and two in 2026 yield an uneven trajectory, though the combined potential value across all seven awards stands at $330.6 million, with only $20.5 million obligated to date (6% drawdown). SCI-reported invoicing across FHWA service contracts grew from zero in FY2023 to $2.6 million in FY2024 (2.2 FTEs) and $6.5 million in FY2025 (7.8 FTEs), suggesting operational scaling on construction-related federal service reporting. On SCI-captured prime contracts, government-paid labor rates median around $414.70 per hour, with senior labor pricing through $438.07 per hour. SEB Engineering self-performs substantially all work — the average subcontractor-hours share on SCI-reportable prime contracts stands at 3% of total hours, with nine named subcontractors appearing sporadically across the portfolio. The vendor operates as a full-and-open small business prime with no presence in 8(a), HUBZone, SDVOSB, or WOSB categories; all awards are total-small-business set-asides.