Southworth-Milton, Inc.

Southworth-Milton, Inc., doing business as Caterpillar Authorized Dealer, is a for-profit Subchapter S Corporation headquartered in Milford, Massachusetts, that supplies heavy equipment, parts, maintenance, and repair services to federal agencies as a prime contractor (79% of recent awards) and subcontractor. The company operates as the regional Caterpillar authorized dealer for the Northeast and competes on full-and-open procurements without SBA set-aside designations, though it holds a Total Small Business designation on select FEMA and other civilian agency awards.

Southworth-Milton's capability portfolio centers on Caterpillar equipment maintenance and repair—generator preventive maintenance and emergency service, diesel engine and charge air cooler assembly supply, heavy loader and compactor service, and equipment rentals and parts fulfillment. Representative prime work includes a $206,056 firm fixed-price purchase order from the Department of Veterans Affairs Veterans Integrated Service Network 2 for FY25 Albany Emergency Generator maintenance and repair services running through February 2030; a $474,728 purchase order from VA VISN 1 for emergency generator service through December 2025; a $336,048 delivery order from the Army Materiel Command Redstone Arsenal for charge air cooler assemblies (part of a $2.018 million single-award indefinite delivery contract through November 2028); and a $239,171 blanket purchase agreement with the Army Corps of Engineers for Caterpillar 924H loader maintenance at the Cold Regions Research and Engineering Laboratory through August 2029.

Customer concentration is driven by federal facility maintenance and defense sustainment work. The top five customer agencies by award count account for 48% of recent awards, led by the Defense Missile Defense Agency (38 awards, no dollar figures disclosed) and VA VISN 1 (34 awards, $2 million combined potential value). By potential value, however, the Army Materiel Command Redstone Arsenal dominates at $2.8 million across five awards, with VA VISN 1 second at $2 million. The Department of Homeland Security Coast Guard places 22 awards valued at $725 thousand, and VA VISN 2 places 13 awards valued at $593 thousand. The concentration gap between volume and dollars reflects high-frequency small purchase orders for maintenance and parts alongside fewer but larger equipment supply and service contracts.

Southworth-Milton holds positions on five named indefinite delivery vehicles: a $2.018 million Army Materiel Command single-award contract for charge air cooler assemblies (12 task orders noted); a $239,171 Army Corps of Engineers blanket purchase agreement for 924H loader maintenance (5 task orders); VA IDV contracts valued at $345,212 for generator maintenance (VA VISN 1) and other service vehicles with 5 task orders documented; a Navy single-award IDV for diesel and related services; and an Army Sustainment Command vehicle with 2 task orders worth $504 thousand combined. Southworth-Milton also maintains indefinite delivery positions with Army Contracting Command Redstone for charge air cooler assembly delivery orders.

Activity has grown substantially over the past five years—12 awards in 2022 to 32 in 2024, with 26 awards in 2025 and 5 in 2026 (incomplete year). Combined potential value across all 251 awards (prime and sub) stands at $9.8 million, though obligated dollars ($19.8 million) exceed potential value, indicating contract modifications and exercise of option periods. Only two awards face ultimate completion within the next twenty-four months (combined potential value $216 thousand), representing minimal recompete pressure near term.

Southworth-Milton's subcontractor footprint is dominated by Raytheon Company, where the vendor supplies generators, heat exchangers, mechanical items, electrical assemblies, and repair parts for the Terminal High Altitude Area Defense (THAAD) radar sustainment and Kingdom of Saudi Arabia AN/TPY-2 radar production programs (50+ named sub-awards since 2022). The vendor also subcontracts to Battelle Memorial Institute on Arctic Research Support and Logistics Services (ARSLS) for Caterpillar parts and equipment rebuild support; to Massachusetts Institute of Technology Lincoln Laboratory on facility maintenance services; to Fluor Marine Propulsion for naval nuclear propulsion program generator maintenance support; to 381 Constructors on Portsmouth Naval Shipyard multi-mission dry dock and fiber relocation projects; and to Valkyrie Enterprises on MIT Lincoln Laboratory facility maintenance. The Raytheon relationship—spanning foreign military sales, in-line chiller studies, and ongoing sustainment programs—represents the vendor's largest sub-prime concentration.

Top NAICS categories reflect the maintenance-and-repair focus: Commercial and Industrial Machinery and Equipment Repair and Maintenance (88 awards), Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System Manufacturing (21 awards), Other Electronic and Precision Equipment Repair (19 awards), and Ship Building and Repairing (18 awards). Top PSC codes include Maintenance/Repair/Rebuild—Equipment (17 awards), Engines, Turbines, and Components (10 awards), Generators and Generator Sets (9 awards), and Ship and Marine Equipment (8 awards). The vendor's registration with SAM.gov dates to September 2007.