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 prime contractor on full-and-open and small business set-aside procurements, with 99% of recent awards executed as prime and 1% as subcontractor work.

Seiler is a for-profit manufacturer headquartered in St. Louis, Missouri, with primary manufacturing operations in Kirkwood, Missouri. The company competes predominantly under Total Small Business set-asides across its prime footprint, though also pursues full-and-open competitions with no SBA certifications beyond small business status. Seiler's concrete capability portfolio centers on fire control quadrants, telescope and quadrant mounts, optical alignment devices, automatic gun feeder assemblies, and precision machined components—delivered across defense platforms and sustainment programs. Recent representative work includes a $2.76 million definitive contract with Army Contracting Command Warren for 233 telescope and quadrant mounts (NSN 1240-01-517-2171) awarded December 2024 under a five-year small business set-aside, a $2.94 million delivery order from TACOM Life Cycle Management Command for 499 collimator infinity units awarded April 2025, a $1.52 million delivery order with ACC Warren for panoramic telescopes (NSN 1240-00-106-7754) awarded July 2025, and an $861,105 definitive contract with ACC Warren for 177 optical alignment devices awarded August 2025 under a total small business set-aside. Civilian work spans survey-grade GPS equipment for the Department of Agriculture and Interior department agencies, with a $985,537 sole-source purchase order from USDA Natural Resources Conservation Service for Trimble T110 tablets and accessories awarded July 2026.

Customer concentration is heavily Army-centric. The top five customer agencies (by award count and combined potential value) account for 76% of recent awards: Defense Logistics Agency Land and Maritime anchors volume with 1,157 awards worth $27 million; Department of the Army places 596 awards; TACOM Life Cycle Management Command executes 462 awards valued at $96.7 million; DLA Aviation executes 271 awards for $8.2 million; and Army Contracting Command Detroit Arsenal (ACC Detroit) concentrates the dollar value with 180 awards worth $306.7 million. Dollar concentration diverges from volume—ACC Detroit and TACOM drive the majority of potential value through larger delivery orders and IDIQs, while DLA Land and Maritime dominates transaction count through high-volume small purchase orders. Seiler serves 78 distinct customer agencies across the federal government, with defense customers representing approximately 95% of recent award dollars.

Seiler holds multiple parent IDIQs anchoring its prime footprint. The vendor operates under five-year Indefinite Delivery Contracts with Army Contracting Command Warren for telescope mounts (NSN 6650-01-340-6082, $13.17 million ceiling extended through October 2030), telescope and quadrant mounts (NSN 1240-01-515-8265, $15.57 million ceiling through September 2029), fire control quadrants (NSN 1290-01-515-8262, $5.57 million ceiling through March 2029), and optical alignment devices (NSN 4931-01-472-7329, $918,000 ceiling through December 2028). Additional single-award IDICs with DLA include a $350,000 Land and Maritime contract and a $350,000 Aviation contract, both through October 2030. Seiler also holds a Basic Ordering Agreement with ACC Warren for Class IX supplies effective through April 2031 under the Basic Ordering Agreement Sustainment Track (BOAST) program, establishing a five-year framework for repair parts and component orders with no funds obligated at award. These vehicles concentrate on optical fire control systems, telescope assemblies, and precision-machined components—deliverables that map directly to Seiler's manufacturing core.

Recent activity shows mild contraction. Awards per year averaged 120 from 2022 through 2026, with 135 awards in 2022, 154 in 2023, declining to 119 in 2024 and 128 in 2025; 2026 year-to-date carries 65 awards (incomplete year). Sixty-three awards carrying a combined potential value of $43.1 million reach ultimate completion within the next twenty-four months, presenting a recompete cliff of material size. The combined potential value across all 3,501 awards in the source snapshot is $525.8 million, with $481.9 million obligated (92% execution).

Seiler's subcontractor footprint is minimal (1% of awards by count). Named sub work appears exclusively under Raytheon Company (ultraprecision machining, precision-machined components, and machine shop work across multiple dates from January through August 2026), Textron Systems Corp (material purchase for 65 Mobile Strike Force Vehicles and spares in support of Ukraine, December 2025), DRS Sustainment Systems Inc. (machined castings for M-LIDS spares, October 2025), and DRS Network & Imaging Systems LLC (Bradley Acquisition Subsystem engineering services and blank mirror purchases, September 2025). Sub relationships cluster in precision machining and component supply under prime contractors rather than systems integration or full-system design roles.

The vendor name is Seiler Instrument And Manufacturing Company, Incorporated. Seiler maintains one named subsidiary, Buildingpoint Mid-America, LLC, a for-profit limited liability company; subsidiary scope and integration into the parent are not detailed in the source. Corporate structure details indicate Seiler is a for-profit corporate entity (not tax-exempt), with no parent company relationship stated. The company registered in SAM in September 2001 and has maintained continuous federal contracting presence through defense and civilian agencies for over two decades, reflecting established relationships and proven manufacturing capability in fire control systems and precision optical equipment for military platforms.

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).