Seiler Instrument And Manufacturing Company, Incorporated

Seiler Instrument And Manufacturing Company, Incorporated manufactures precision optical instruments, fire control components, and specialized mechanical assemblies for federal defense and civilian agencies as a small business prime contractor on 99 percent of its federal awards, competing predominantly in full-and-open procurements with some total small business set-aside designations.

Seiler is a for-profit manufacturer headquartered in St. Louis, Missouri, with manufacturing operations at Kirkwood, Missouri. The company is a small business with no stated SBA certifications beyond small business status. Primary NAICS categories center on optical instrument and lens manufacturing (713 awards), small arms and ordnance accessories manufacturing (166 awards), and miscellaneous fabricated metal products (197 awards). Product Service Code concentration reflects the core capability portfolio: optical sighting and ranging equipment (1,051 awards), optical instruments and test equipment (398 awards), miscellaneous fire control equipment (241 awards), and fire control maintenance and repair shop equipment (165 awards). Recent representative work includes a $5.33 million delivery order from Army Contracting Command Warren for 1,025 telescope mounts (NSN 6650-01-340-6082) awarded October 2025 with September 2028 completion; a $4.99 million delivery order from TACOM for 126 automatic gun feeder assemblies (NSN 1005-01-461-5038) awarded September 2024 with August 2027 completion; a $2.77 million definitive contract from ACC Warren for 233 telescope and quadrant mounts (NSN 1240-01-517-2171) awarded December 2024 with October 2027 completion; a $2.94 million delivery order from TACOM for 499 collimator, infinity units (NSN 1240-01-465-5452) awarded April 2025 with September 2027 completion; and a $499 thousand purchase order from USDA Natural Resources Conservation Service for GPS and GIS equipment awarded September 2024.

Seiler's customer concentration is heavily weighted toward Army programs. The top five customers by award count account for 76 percent of recent awards: Defense Logistics Agency Land and Maritime (1,147 awards, $26.6 million combined potential value), the Department of the Army (596 awards, $1.3 million), TACOM Life Cycle Management Command (462 awards, $89.1 million), DLA Aviation (265 awards, $7.3 million), and Army Contracting Command Detroit Arsenal (178 awards, $313.1 million). The customer concentration by dollar value reveals a different ranking: ACC Detroit Arsenal anchors the portfolio with $313.1 million across 178 awards—primarily a single large vehicle—followed by TACOM ($89.1 million across 462 awards) and DLA Land and Maritime ($26.6 million across 1,147 awards). This divergence signals that DLA places many small orders while Detroit Arsenal concentrates value on fewer, larger awards; TACOM balances volume and dollar magnitude.

Seiler places work under five primary indefinite delivery vehicles. A $13.17 million five-year IDIQ with ACC Warren for telescope mounts (6650-01-340-6082) awarded October 2025 carries a ceiling of 2,274 units with minimum 69 units, funded through October 2030. A $15.57 million five-year IDIQ with ACC Warren for telescope and quadrant mounts (NSN 1240-01-515-8265) awarded September 2024 establishes a 750-unit maximum through September 2029. A $5.57 million five-year IDIQ with ACC Warren for fire control quadrants (NSN 1290-01-515-8262) awarded March 2024 carries a 110–688 unit band through March 2029. A $918 thousand five-year IDC with ACC Warren for optical alignment devices awarded December 2023 extends through December 2028. A $350 thousand IDC with DLA Land and Maritime (Total Small Business set-aside) awarded November 2025 runs through November 2026. Beyond named parent vehicles, Seiler operates under five unlabeled IDCs (DAAE2098D0054, W52H0904D0020, W52H0904D0109, DAAE2003D0124, DAAE2003D0125) collectively supporting 90 task orders.

Activity has fluctuated year over year: 135 awards in 2022, 154 in 2023, declining to 119 in 2024, recovering to 127 in 2025, with 37 awards (partial year) through mid-June 2026. Seventy-five awards with ultimate completion dates in the next twenty-four months carry combined potential value of $39.2 million, representing modest recompete exposure given the vendor's large installed base of five-year IDIQs and IDCs that continue through 2029–2030.

Seiler subcontracts to prime contractors in machining and precision fabrication roles. Named primes include Raytheon Company (seven sub-awards for precision machined components, ultraprecision machining, and tool kits supporting CIWS and FLIR programs, 2025–2026), Textron Systems Corp (one sub-award for material purchase supporting 65 Mobile Strike Force Vehicles to Ukraine, December 2025), DRS Sustainment Systems Inc. (one sub-award for machined castings on M-LIDS spares, October 2025), and DRS Network & Imaging Systems LLC (one sub-award for mirror blanks and first-article charges on Improved Bradley Acquisition Subsystem, September 2025). Subcontract work represents only 1 percent of the vendor's federal portfolio and focuses on precision fabrication and component manufacturing rather than system integration.

Seiler maintains one named subsidiary, Buildingpoint Mid-America LLC, a for-profit limited liability company; no corporate parent is identified. The company has operated continuously in federal contracting since at least October 1980 and has been SAM-registered since September 2001. Combined potential value across 3,472 awards over the source period reaches $522 million, with $412.1 million obligated, reflecting strong payment velocity.

OEM for sighting devices (used on howitzer, mortar, & tank systems), opto-mechanical subassemblies, boresights, and test fixtures. Capabilities: close-tolerance machining, overhaul, and military spec testing (environmental, shock, & vibration).