Sevenson Environmental Services, Inc.

Sevenson Environmental Services, Inc., a Subchapter S corporation and small business headquartered in Niagara Falls, New York, operates as a prime contractor (93% of awards) providing environmental remediation and hazardous waste removal services to federal agencies under Total Small Business set-asides and full-and-open designations. The company holds a $6.78 billion combined portfolio of federal awards spanning 319 prime contracts and indefinite delivery vehicles, with $2.33 billion obligated across active work. Sevenson competes predominantly across set-aside vehicles but maintains a significant presence in unrestricted competition; the vendor maintains one named subsidiary, SA Environmental II LLC.

Sevenson's capability portfolio centers on Superfund remedial action, soil excavation, sediment dredging, groundwater treatment, facility decommissioning, demolition, and site restoration at contaminated federal properties. Concrete representative work includes a $199.5 million cost-plus-fixed-fee definitive contract with EPA Region 2 for remedial action at the Former Cornell-Dubilier Electronics Superfund Site in South Plainfield, New Jersey (awarded September 2024, extending through September 2032); a $151.1 million firm-fixed-price delivery order with EPA Region 5 for sediment remediation at Cuyahoga Gorge Dam in Cuyahoga Falls, Ohio (awarded January 2025, completing August 2029); a $72.06 million firm-fixed-price definitive contract with the Army Corps of Engineers Seattle District for debris removal and sheet pile wall replacement at the Wyckoff Superfund Site on Bainbridge Island, Washington (awarded September 2024, completing December 2027); and a $63 million cost-plus-fixed-fee definitive contract with EPA Region 2 for remedial action at the Matteo site in National Park, New Jersey (awarded March 2024, completing March 2029).

Customer concentration sits heavily with EPA and Army Corps of Engineers districts. EPA Region 5 anchors the largest potential value—$2.35 billion across eight awards—followed by the Army Corps of Engineers Kansas City District ($1.73 billion across 28 awards) and EPA Region 2 ($999 million across 43 awards). These three customers account for roughly 85% of combined potential value. By award count, the Army Corps of Engineers (all districts combined) and EPA Region 2 dominate, with the Army Corps accounting for 62 awards at $88.1 million and EPA Region 2 placing 43 awards at $999 million, reflecting a split between volume and dollar concentration—EPA Region 2 places fewer but substantially larger individual awards.

Sevenson holds nine primary indefinite delivery contracts totaling over $2.2 billion in ceiling value. The largest vehicle is the EPA Region 5 Great Lakes National Program Office Remediation and Restoration Services (GLNPO-RRS) II contract, a $960 million multiple-award IDIQ awarded January 2024 (one of four awardees) and extending through January 2029, under which Sevenson executed a $155.9 million task order for Cuyahoga Gorge sediment remediation. The Army Corps of Engineers Kansas City District Small Business Pre-placed Remedial Action Contract provides a $245 million ceiling (awarded October 2025, effective through October 2030), designated Total Small Business. Sevenson also holds a $96 million single-award IDIQ with the Army Corps of Engineers Philadelphia District for Formerly Utilized Sites Remedial Action Program services at the former DuPont Chambers Works site (awarded November 2024, through November 2029), a $90 million single-award IDIQ with the Army Corps of Engineers Savannah District (awarded April 2025, through October 2030), and a $49 million single-award IDIQ with the Army Corps of Engineers New England District for the Raymark Superfund Site in Stratford, Connecticut (awarded July 2025, through July 2030). Additional vehicles include a $176.25 million multiple-award IDIQ under the MEGA Small Business PRAC 2021–2026 with the Army Corps of Engineers for EPA Region 2 and Northwestern Division work (awarded October 2021, through September 2026), an $88.125 million multiple-award Pre-placed Remedial Action Contract with the Army Corps of Engineers Mississippi Valley Division and EPA Regions 5 and 7 (awarded August 2022, through August 2027), a $245 million multiple-award IDIQ with the Army Corps of Engineers Kansas City District (awarded November 2023, through November 2028), and a Naval Facilities Engineering Command Environmental Remedial Action Contract (EMRAC) for military site cleanup work.

Activity has grown over the recent period, with eight awards in 2022, fifteen in 2023, and twenty-three in 2024, declining slightly to twelve in 2025 and three in 2026 (reflecting the snapshot date). Twenty-two awards with combined potential value of $298.4 million reach ultimate completion within the next twenty-four months, creating recompete exposure across Army Corps and EPA vehicles. The most active parent vehicles include the indefinite delivery contract DACW4194D9012 (21 task orders), W912WJ15D0001 (17 task orders), the Environmental Remedial Action Contract (15 task orders, $64.2 million combined potential value), and W912DQ04D0023 (14 task orders, $216.5 million combined potential value).

Sevenson operates as a prime on the vast majority of work but maintains a subcontractor footprint with larger engineering firms managing complex Superfund sites. The vendor subcontracts to Jacobs Project Management Company on multiple task orders for New Bedford Harbor Superfund Site dredging and cell removal work (awarded across 2023–2026), to EA Engineering, Science, and Technology, Inc. on American Creosote Works Superfund remediation in Louisiana, to Cambridge International Systems, Inc. on New Bedford Harbor remedial action, and to Amentum Technology, Inc. on Shallow Land Disposal Area trench excavation. Across SCI-reportable prime contracts, average sub-hours share is 50%, with seven total named subcontractors reported, indicating balanced make-or-buy posture on labor-intensive remediation work.

Service Contract Inventory data captures only $809 thousand in invoiced federal service contract revenue across FY2022–FY2024 (representing a strict subset excluding goods, products, and non-federal revenue), with 20.5 FTEs reflected in FY2024 across prime and named-subcontractor roles. Government-paid hourly rates on SCI-reportable prime contracts run a median of $427.74/hr, with senior labor and engineering positions reaching $937.84/hr at the 90th percentile, reflecting field supervision, safety, and technical management staffing on large-scale remediation projects. SCI coverage is minimal relative to Sevenson's total federal contracting footprint—the $809 thousand invoiced across three years represents a negligible fraction of the $6.78 billion combined award potential—indicating that the bulk of Sevenson's federal revenue flows through fixed-price and cost-plus-fixed-fee definitive contracts and task orders rather than hourly labor billing.

Sevenson Environmental Services competes across set-aside (predominantly Total Small Business) and full-and-open vehicles, with recent activity skewing toward EPA Region 5 and Army Corps districts in the Northeast and Great Lakes regions. The vendor's scale, geographic footprint, and IDIQ holdings position it as a primary provider for federal Superfund remedial action, FUSRAP, and BRAC environmental cleanup across multiple EPA regions and Army Corps divisions.