Southern Indiana Steel Inc.

Southern Indiana Steel Inc., a small business manufacturer based in Loogootee, Indiana, operates as a prime contractor delivering precision fabrication and machine shop services to the Department of Defense, competing predominantly under total small business set-asides on task orders and purchase orders. The company is a Subchapter S Corporation that has held a $50 million blanket purchase agreement with Naval Sea Systems Command since October 1, 2022, running through September 30, 2027, which anchors virtually all of its federal work.

Southern Indiana Steel's customer footprint is heavily concentrated with the Navy. The top two customers account for 100% of combined potential value: Naval Sea Systems Command holds 32 awards valued at $131.7 million, and Naval Strategic Systems Programs holds 30 awards valued at $1.9 million. A meaningful secondary tier includes the Army Materiel Command Joint Munitions Command (16 awards, $375 thousand), Naval Supply Systems Command (3 awards, $288 thousand), and the Marine Corps (5 awards, $267 thousand), representing just 11% of the 88-award base. The concentration is extreme — Naval Sea Systems Command alone represents 97.5% of combined potential value across the prime footprint.

The company's capability set is tightly specialized: precision fabrication, machine shop services, and manufacturing of high-tolerance mechanical components and assemblies for naval strategic weapons systems, shipbuilding, and missile defense. Representative work includes a $237 thousand task order for high-temperature window assemblies (Naval Sea Systems Command, March 2025), a $208.8 thousand purchase order for handling fixtures for inertial measurement units (Naval Strategic Systems Programs, September 2023), a $244.35 thousand task order for shipping and storage assemblies for the Altum Propulsion Module (Naval Strategic Systems Programs, January 2023), a $187.136 thousand task order for APM trunnions (Naval Strategic Systems Programs, August 2025), and a $142.488 thousand task order for APM O-ring installation kits (Naval Strategic Systems Programs, July 2025). Work spans a catalog of defense-specific components: restraint rings, O-ring installation kits, bore sleeves, upending fixtures, foam inserts, coupler bracket replacements, and hydraulic cylinders, nearly all supporting sea-based nuclear deterrent programs or naval shipbuilding initiatives.

Southern Indiana Steel places task orders against three named BPAs: the primary $50 million Naval Sea Systems Command master agreement (referenced as N0016422A0027 in recent task orders, with 26 task orders valued at $2.2 million), and two subordinate parent vehicles (N0016417AF009, 32 task orders, $1.3 million; and N0016416A0016, 5 task orders, $294 thousand). The cumulative obligations reported across all 99 awards total only $5 million (4% of the $134.8 million combined potential value), reflecting the lag between task-order ceiling and actual invoicing typical of multi-year fabrication work.

Award activity has grown modestly: five awards in 2022, nine in 2023, eight in 2024, thirteen in 2025, and one award year-to-date in 2026 (a $39.52 thousand stack adapter assembly task order from the Department of the Army, issued May 27, 2026, completing October 2, 2026). The recompete cliff is minimal — only one award with an ultimate completion date in the next twenty-four months, valued at $139 thousand, indicating that the Navy's master BPA runs through September 2027 and shields the vendor from near-term recompete pressure on the bulk of the portfolio.

The company's NAICS concentration reflects its manufacturing footprint: 69 awards fall under Machine Shops, 12 under Metal Service Centers and Other Metal Merchant Wholesalers, six under Sheet Metal Work Manufacturing. Top PSC categories align with naval demand: Guided Missile Handling and Servicing Equipment (12 awards), Miscellaneous Special Industry Machinery (10 awards), and Launchers and related structural shapes (12 awards combined). Southern Indiana Steel holds no subcontract work in the award portfolio — 100% of recent activity is prime awards.