Quantum Lean LLC

Quantum Lean LLC, doing business as Mac Machine Company, is a small business manufacturer based in Windsor Mill, Maryland, that delivers precision-machined components and hardware for naval weapons platforms and defense systems, operating almost exclusively as a prime contractor (95% of recent awards) under total small business set-asides and full-and-open competitions with the Department of the Navy.

Quantum Lean is a for-profit limited liability company and manufacturer of goods structured as a partnership or LLC. The vendor's capability portfolio centers on precision turned products, bolts, nuts, screws, rivets, washers, and ordnance-related hardware — work characterized by NAICS codes 332710 (metal valve and pipe fitting manufacturing), 332721 (precision turned product manufacturing), 332722 (bolt, nut, screw, rivet, and washer manufacturing), and 332941 (machine shops). Representative prime work includes a $603,054 total small business set-aside definitive contract awarded by Naval Sea Systems Command on March 3, 2026 (ultimate completion August 24, 2026) for CKU-5 heads, breech, nozzle, tang, and retainer hex components; an $80,865.50 purchase order from NAVSEA on May 25, 2023 for MANIFOLD 834AS101 REV D under total small business set-aside; and a $219,542.30 purchase order from NAVSEA on September 27, 2022 for retainer and hex head components under full-and-open competition. Work is performed at Windsor Mill and Milford Mill, Maryland.

Customer concentration is extreme and static: Naval Sea Systems Command accounts for 72 awards and $3.4 million of the combined potential value across all 93 awards in the source data, representing 95% of awards and 62% of combined potential value at portfolio level. The remaining customer set — the Department of the Navy (9 awards), the Army Acquisition Support Center PEO Missiles and Space (4 awards), the Office of Personnel Management (2 awards, $181 thousand), and NASA Goddard Space Center (1 award) — collectively account for 5% of awards and no more than 38% of dollars. Quantum Lean places task orders under three NAVSEA indefinite delivery contracts: N0017407A0006 (27 task orders, $368 thousand combined potential value), N0017406D0014 (11 task orders, $797 thousand), and N0017409D0016 (5 task orders, $497 thousand). The vendor also holds positions on the Advanced Technology Support Program IV (4 task orders) and a NAVSEA Blanket Purchase Agreement N0017414A0044 (2 task orders, $12 thousand).

Activity has been episodic — two awards in 2022, one in 2023, three in 2024, one in 2025, and three in 2026 — with only one award (the $603,054 March 2026 contract) completing within the next twenty-four months and therefore facing recompete. The source data spans four decades, from 1985 to 2026, with combined obligated dollars of $5.3 million against a combined potential value of $5.8 million (90% obligation rate). In its subcontractor role, Quantum Lean delivers precision-machined components to Raytheon Company under the Advanced Technology Support Program for sense-and-intercept equipment and counter-unmanned aircraft system enhancements, and delivers generator end covers to Honeywell International. The subcontract footprint is minimal — five sub-awards dating from 2024 to 2026 — relative to the prime business.