Derosa Environmental Consulting Inc.

Derosa Environmental Consulting Inc., a small business based in Rowley, Massachusetts, provides aquatic invasive species control and environmental surveys to the U.S. Army Corps of Engineers as a 100% prime contractor under total small business set-asides. The firm operates exclusively under NAICS 541990 (Environmental Consulting Services) and related landscape and environmental-services codes, with a specialized focus on herbicide treatment, aquatic plant surveys, and invasive species management across New England waterways.

Derosa's customer concentration is absolute: all 26 awards in the source data derive from the Department of the Army Corps of Engineers Engineering District New England (ENDIST New England), which accounts for the full $1.6 million combined potential value. The vendor has no subcontract footprint and no work with other federal agencies. Award frequency has grown modestly — two awards per year in 2022–2024, then four in 2025, with two through May 2026 — though the absolute dollar volumes remain modest relative to typical federal contractors. Only one award ($79 thousand) completes within the next twenty-four months, creating minimal recompete cliff exposure.

Derosa's capability portfolio centers on milfoil and invasive aquatic plant control through systematic herbicide application (Granular Fluridone, Liquid Diquat Dibromide, and related treatments) across approximately 11 to 50 acres per engagement, paired with comprehensive invasive plant species surveys, manual water chestnut removal, and water quality testing. Representative work includes a $119,308.80 firm fixed-price purchase order awarded May 21, 2025, for aquatic herbicide application at East Brimfield Lake in Sturbridge, Massachusetts, with completion targeted for October 30, 2025; a $82,943.00 purchase order awarded May 11, 2026, for control of invasive species and aquatic surveys at Buffumville Lake in Charlton, Massachusetts and Hodges Village Dam in Oxford, Massachusetts, with completion due September 30, 2026; and a $78,778.00 purchase order awarded May 15, 2026, for aquatic herbicide treatment across approximately 50 acres at Hopkinton Lake in Hopkinton, New Hampshire and Everett Lake in Weare, New Hampshire, due December 31, 2026. All awards are firm fixed-price purchase orders under total small business set-asides, with performance locations at New England lakes, reservoirs, and rivers. The vendor furnishes all materials, equipment, labor, and transportation; some contracts include government options for post-treatment water testing and re-treatment if follow-up evaluation indicates need.