Lee Engineering Supply Company, Inc.

Lee Engineering Supply Company, Inc., doing business as Amerimex USA, is a small business maritime and industrial parts supplier based in Harahan, Louisiana, that operates almost exclusively as a prime contractor on federal purchase orders for specialized ship-support equipment and maintenance components serving the Department of the Navy and related defense agencies.

The vendor's portfolio centers on air compressor parts, overhaul kits, mooring lines, and related marine equipment for naval vessels operated by the Military Sealift Command, including T-AKE, T-ESB, and USNS-class ships. Representative work includes a $274,994.51 purchase order from the Military Sealift Command in January 2023 for N104A2/PM3 air compressor parts for the USNS John L. Canley (T-ESB 6), a $55,350 total small business set-aside purchase order in September 2025 for Sperre Air Power air compressor parts, a $31,690 total small business set-aside purchase order from the National Oceanic and Atmospheric Administration in August 2025 for mooring lines to support the NOAA Ship Oscar Dyson, and recurring Defense Logistics Agency Aviation contracts for corrosion inhibitors. The vendor also subcontracts to Vigor Marine LLC and The Dutra Group on shipyard maintenance and marine equipment work, including labor and materials for USNS John Lewis restoration ($2 million addition as of December 2023) and filter supply work.

Customer concentration is extreme. The Department of the Navy's Military Sealift Command dominates the portfolio with 197 awards (77% of all awards in the source data) and $3.7 million in combined potential value (84% of total dollars). The Department of Homeland Security U.S. Coast Guard places 21 awards worth $128 thousand combined, the Department of the Navy (non-MSC) holds 10 awards worth $212 thousand combined, and the National Oceanic and Atmospheric Administration, the Army Corps of Engineers, and Defense Logistics Agency Aviation account for the remainder. The disparity between award count and dollar concentration reflects MSC's reliance on numerous small purchase orders for replacement parts and maintenance kits rather than large single awards.

The vendor's activity pattern shows volatility within a concentrated base. Awards per year ranged from two in 2022 to seventeen in 2023, with twelve in 2024, seven in 2025, and one reported for 2026 through mid-January. The portfolio spans 254 awards since 1989 with combined potential value of $4.4 million and combined obligations of $4.6 million, indicating nearly complete obligational delivery across historical awards. Ninety-nine percent of awards are prime contracts; the vendor subcontracts only minimally.

The vendor competes across mixed set-aside posture. A subset of awards carry total small business set-aside designations—common on purchases for air compressor overhaul kits, mooring lines, and dehydrator parts—while others are full-and-open or carry no set-aside designation. The source data does not indicate 8(a), HUBZone, SDVOSB, or other category certification beyond small-business classification. The vendor's dominant NAICS categories are Commercial and Industrial Machinery Repair and Maintenance (119 awards) and Air and Gas Compressor Manufacturing (44 awards), with secondary codes for Ship Building and Repairing (26 awards) and Industrial Machinery Merchant Wholesalers (12 awards). Top PSC codes are Miscellaneous Ship and Marine Equipment (134 awards) and Maint/Repair/Rebuild of Equipment—Ship and Marine Equipment (34 awards).

Amerimex USA is a for-profit corporation with no disclosed parent entity or ownership classification beyond small-business status. The vendor has maintained federal registration since at least 2004. The business model centers on procurement and delivery of manufacturer-specific (OEM) parts—particularly Sperre Air Power compressors—and related maintenance components to naval vessel fleets, a niche with recurring, predictable demand but limited growth trajectory beyond MSC's current fleet composition and maintenance cycle.

Lee Engineering supplies the marine industry with water solutions, boiler feed pumps, compressors and cleaning systems. We distribute the best brands and strive to support environmentally friendly products.