Environmental Science Corporation

Environmental Science Corporation, a Tokyo-based for-profit environmental services firm, delivers environmental compliance, ecological monitoring, hazardous materials management, and conservation services as a prime contractor (93% of recent awards) to U.S. Department of Defense installations throughout Japan and the Pacific region. The vendor operates without SBA set-aside designations across full-and-open competition, serving Navy, Marine Corps, Army, and Air Force customers on a firm fixed-price basis under multiple indefinite delivery vehicles anchored in the Japan region.

Environmental Science Corporation is a subsidiary of ESC Pacific Inc., headquartered in Honolulu, Hawaii. The parent company structure enables Environmental Science Corporation to function as a dedicated platform for overseas military environmental support, with the Tokyo office registered in the System for Award Management since 2005 and legally authorized to operate under Japanese law. Environmental Science Corporation competes without set-aside categories across its entire prime portfolio, a positioning that reflects the international nature of the work and host-nation compliance requirements.

The vendor's concrete capability portfolio centers on environmental compliance and conservation services at forward-deployed U.S. military installations. Representative prime work includes a $5.7 million purchase order from Naval Facilities Engineering Command for removal, rinse, and disposal of aqueous film forming foam material across five Naval installations in Japan (award September 2025); a $2.9 million purchase order from the Army Corps of Engineers Engineering District Japan for hazardous material and hazardous waste management program support at Yokota and Misawa Air Bases through March 2030 (award April 2025); a $1.44 million delivery order from the Marine Corps for flora and fauna surveys at the Jungle Warfare Training Center at Marine Corps Base Camp Smedley D. Butler (award January 2024); and a $1.3 million firm fixed-price definitive contract from Pacific Air Forces for radon mitigation at 64 military family housing units (award February 2022). Capability work spans air emissions monitoring and inventory preparation, drinking water and wastewater surveillance and testing, asbestos and lead-based paint surveys, underground storage tank integrity assessment, stormwater and illicit discharge prevention planning, invasive species control and terrestrial management, archaeological and cultural resources monitoring, and environmental compliance plan development and updates.

Customer concentration is geographically and functionally monolithic. The Navy's Naval Facilities Engineering Command accounts for 49 awards and $59.5 million in combined potential value; the Army Corps of Engineers Engineering District Japan (ENDIST Japan) leads by volume with 214 awards worth $40.5 million combined potential value. Together with the Marine Corps (62 awards, $7.6 million), Navy Installations Command (53 awards, $7.2 million), and Pacific Air Forces (25 awards, $5.1 million), these five customer agencies represent 403 of 431 total awards (94% coverage) and $119.9 million of $122.1 million combined potential value. All work is performed in Japan or at U.S. military installations in the Pacific region under the Status of Forces Agreement (SOFA) program, which tightly constrains the vendor's addressable market to overseas defense environmental services where host-nation legal registration and operational authority are mandatory.

Environmental Science Corporation holds a $25 million multiple-award indefinite delivery contract with Naval Facilities Engineering Command Far East (awarded December 2022, extending through December 2030) that serves as the primary vehicle for task order issuance across Navy, Marine Corps, Army, and Air Force bases in Japan. The contract encompasses 23 delivery orders executed to date worth approximately $5.5 million. The vendor also places work under several Marine Corps delivery orders, including Indefinite Delivery Contract N4008423D0085 (24 task orders, $5.2 million combined potential value) and N4008417D0069 (46 task orders, $3.9 million). Army Corps of Engineers Engineering District Japan awards are predominantly structured as purchase orders and delivery orders rather than task orders under a formal IDIQ vehicle, reflecting the variety of solicitation approaches used by ENDIST Japan for environmental compliance work.

Activity has remained steady over the past five years (25 awards in 2022, 27 in 2023, 18 in 2024, 27 in 2025, and 3 in early 2026). Nineteen awards with ultimate completion dates in the next twenty-four months carry combined potential value of $5.4 million, representing moderate recompete exposure relative to the vendor's $122.1 million total pipeline. The award portfolio is heavily weighted toward environmental consulting services (285 awards by NAICS) and engineering services (76 awards), with smaller concentrations in testing laboratories and remediation work.

Environmental Science Corporation subcontracts with major defense engineering firms as a specialized environmental services provider. Named primes include AECOM Technical Services (environmental and engineering support on projects including AFFF fire protection system repair, hazardous materials surveys, and design services for military family housing and facility renovations), Jacobs Government Services Company (architect-engineer services for waterfront inspections, facility repairs, and structural assessments), HDR Engineering (survey and engineering support for construction projects including amphibious combat vehicle wash racks and fire suppression system replacement), and CDM Federal Programs Corporation (water sampling and field investigation support). Sub work is characteristically environmental technical support—surveys, testing, site investigations, hazmat reports, and engineering documentation—that augments the design and construction execution roles of the prime contractors. The vendor's sub-award portfolio comprises 31 awards (7% of total), a small but consistent presence on major engineer-procure-construct programs in the Pacific theater.

Environmental Science Corporation's market position depends entirely on sustained access to overseas military basing infrastructure in Japan. No awards in the source data extend beyond the Pacific region or stateside U.S. military installations. The vendor's registration under Japanese law, Tokyo headquarters, and exclusive focus on SOFA-program environmental compliance work create a defensible but narrow niche that is not easily replicable by vendors without Japan operational licensing or local environmental compliance expertise.