Horsley Witten Group, Inc.

Horsley Witten Group, Inc., doing business as Horsley & Witten Inc., is a for-profit Subchapter S Corporation environmental consulting firm based in Sandwich, Massachusetts, that delivers water resources management, watershed planning, environmental compliance, and emergency preparedness services to federal agencies as a prime contractor on 99% of awards. The firm competes across both full-and-open and total small business set-aside vehicles, with set-aside work anchoring most of its federal portfolio.

The vendor's customer base concentrates heavily in environmental and water-sector federal programs. The EPA Office for Water dominates the footprint, accounting for 110 awards and $111.7 million in combined potential value — about 46% of the total federal award base. NOAA ranks second with 60 awards and $14.4 million, followed by the Indian Health Service (17 awards, $1.7 million), EPA Region 3 (15 awards, $2.5 million), and EPA Region 1 (12 awards, $6.8 million). The top two customers represent 77% of awards by count, while the top five account for 77% of the award count. EPA Region 9, though accounting for only 8 awards, carries $52.3 million in combined potential value — signaling a handful of high-dollar regional task orders, particularly for coastal resilience and wastewater infrastructure work in Hawaii and Puerto Rico that dwarf the typical task order volume from EPA Headquarters.

Horsley Witten's capability portfolio centers on water infrastructure resilience, disaster preparedness, cybersecurity for water systems, lead service line inventory and removal planning, watershed monitoring and restoration, and all-hazards emergency response training. Representative prime work includes a $9.9 million single-award EPA BPA for all-hazards emergency preparedness and response programs for water security (awarded November 2023, running through November 2028); a $5 million single-award NOAA BPA for watershed management services in U.S. territories including Culebra (Puerto Rico), the U.S. Virgin Islands, and Hawaii (awarded October 2022, running through September 2027); a $3.7 million EPA task order under the Office of Water IDIQ for technical support to state lead service line inventories and removal (awarded December 2022, ultimate completion December 2024); and a $1.17 million EPA delivery order for technical and administrative support for the Waters of the United States proposed rule and Clean Water Act Section 401 certification proposed rule (awarded September 2022, completed September 2024). Recent work from FY2026 includes BPA calls under the NOAA watershed-management BPA for implementation of restoration actions to reduce land-based inputs to Olowalu Reef in Hawaii ($98,305) and watershed monitoring in Culebra, Puerto Rico ($63,844), both awarded in September–October 2026.

Vehicle positioning: Horsley Witten holds seats on the GSA Multiple Award Schedule (MAS) base contract (awarded February 2022, $2 million ceiling, running through February 2027), which serves as the parent vehicle for three nested BPAs: the $9.9 million EPA single-award BPA for water security emergency preparedness, the $500,000 EPA Region 1 multiple-award BPA for clean water program support, and the $5 million NOAA single-award BPA for watershed management. The firm also chairs its own Professional Services Schedule contract and holds positions on multiple EPA and NOAA IDIQ vehicles. Most recently, on December 19, 2024, GSA awarded Horsley Witten a seat on the OASIS+ Total Small Business multiple-award IDIQ — a governmentwide platform with an overall contract ceiling (placeholder value) and base period through December 2029, enabling task-order competition across seven functional domains: Management and Advisory, Technical and Engineering, Research and Development, Intelligence Services, Environmental Services, Facilities, and Logistics.

Activity trajectory shows steady, modest decline over recent years: 19 awards in 2022, 18 in 2023, 17 in 2024, dropping to 9 in 2025 and 8 in 2026 year-to-date. The combined potential value across the entire 277-award portfolio is $240.8 million, with $75.3 million obligated (31% realization rate). A recompete cliff is present: 15 awards carrying combined potential value of $3.5 million complete within the next twenty-four months, including the EPA Region 9 Lahaina drainage-plan work (awarded August 2024, completing August 2025) and multiple NOAA Culebra watershed calls (September–December 2024 awards, completing March–October 2025).

Service Contract Inventory data shows Horsley Witten invoiced $11.5 million across SCI-reportable prime contracts from FY2022 through FY2025, averaging roughly 7.9 FTEs per fiscal year. FY2024 was the peak period, with $3.7 million invoiced across 11.2 FTEs; FY2025 data declined to $2.3 million across 7.1 FTEs, consistent with the overall award-volume decline. On federal services contracts captured in SCI, median government-paid rates run around $148.23 per hour, with the spectrum spanning $105.71 per hour (10th percentile) through $256.63 per hour (90th percentile). GSA Schedule labor categories span 13 roles at rates from $62.28 per hour (Administrative Support) to $227.11 per hour (Principal), covering associate through master's education with one to twelve years' experience; no security-cleared positions are offered. Across SCI-reportable prime contracts, subcontractors account for an average 25% share of contractor hours, with 33 named subs appearing across the portfolio — indicating a mixed delivery model in which Horsley Witten self-performs core environmental consulting and planning work while engaging specialized subs for discrete technical or administrative tasks.

Teaming is minimal: Horsley Witten subcontracts to Eastern Research Group Inc. on EPA-funded technical assistance for rural, tribal, and small-utility wastewater infrastructure and lead service line work (three named sub awards from March 2023 through August 2025). The firm operates predominantly as a prime, with sub activity representing less than 1% of the award count and serving a feeder role for larger vehicles rather than a strategic partnership posture.

DOMESTIC AND INTERNATIONAL ENVIRONMENTAL CONSULTING SERVICES IN WATER RESOURCES & LAND PLANNING. SPECIALISTS IN HYDROGEOLOGY, WETLANDS ECOLOGY, COASTAL MANAGEMENT, DRINKING WTAER PROTECTION, LAND USE, PROGRAM DEVELOPMENT & POLICY ANALYSIS.