System Dynamics International Incorporated

System Dynamics International Incorporated, doing business as SDI, is an SBA-certified women-owned small business headquartered in Huntsville, Alabama, that operates as a prime contractor (96% of recent awards) providing systems engineering, R&D, flight training, and technical sustainment services to Army aviation programs and Navy shipboard systems. SDI operates under a Subchapter S corporate structure and holds a subsidiary, Momentum Aviation Systems GP, a joint-venture women-owned small business.

SDI's customer concentration is heavily weighted toward the Department of the Army. Of recent awards covering 90% of the portfolio, the Department of the Army accounts for 382 awards, with the Army Materiel Command Aviation and Missile Life Cycle Management Command (28 awards, $2.1 million combined potential value) and the Army Acquisition Support Center's Program Executive Office for Aviation (12 awards, $26.2 million combined potential value) driving near-term volume. However, the top-customers-by-potential-value ranking diverges sharply: the Department of the Navy's Naval Sea Systems Command anchors $9.28 billion across four awards, and the GSA Federal Acquisition Service carries $3.79 billion across six awards, reflecting SDI's recent seats on major government-wide vehicle IDIQs. The Navy's Naval Air Systems Command Naval Air Warfare Center brings a second $249.7 million across two awards. This concentration pattern — high Army task-order volume on legacy vehicles offset by massive Navy and GSA potential value on newer IDIQs — signals a structural rebalance in SDI's customer portfolio.

SDI's prime-contract work centers on unmanned systems, aviation training, and missile systems R&D. Representative awards include a $1.1 million firm fixed-price delivery order from PEO Aviation (May 2025) for Small Unmanned Aircraft System flight training with government-furnished equipment, performed in Huntsville through May 2026; a $437.7 thousand delivery order from the Army Materiel Command (August 2023) for Soldier Uncrewed Aircraft System technical support and sustainment engineering; and a $1.1 million firm fixed-price order from PEO Aviation (April 2022) for SUAS flight training. Category concentration across the prime footprint is dominated by R&D (268 awards coded to R&D-Defense Other for applied research and exploratory development), with support for engineering and management (38 awards) and advanced development (14 awards) rounding out the R&D-heavy posture. Primary NAICS work sits under 541330 (Engineering Services) with secondary activity in research and development services and air transportation support.

SDI holds five major parent vehicles. The two largest by task order count are legacy Army Indefinite Delivery Contracts: DAAH0190D0107 with 123 task orders and DAAH0188D0159 with 78 task orders, reflecting decades of sustained Army sustainment work. Basic Ordering Agreements DAAH0187DA005 (50 task orders) and DAAH0185D0003 (31 task orders) continue that footprint. On newer vehicles, SDI placed a $4 billion Seaport Next Generation (Seaport-NXG) multiple-award IDIQ with Naval Sea Systems Command (awarded January 2025), with a minimum-guarantee task order issued March 2025 at $500 nominal value. SDI also holds the $151 billion Scalable Homeland Innovative Enterprise Layered Defense (SHIELD) multiple-award IDIQ with the Missile Defense Agency (awarded December 2025, ultimate completion December 2035), with an initial delivery order of $500 nominal value issued December 2025. Both mega-vehicles carry no set-asides and compete full-and-open. On GSA, SDI holds seats on an OASIS+ Women-Owned Small Business IDIQ (awarded September 2024, $999.999 billion placeholder ceiling, performance through September 2029) and an OASIS+ Total Small Business set-aside IDIQ (awarded May 2026, $999.999 billion placeholder ceiling, performance through December 2034). The GSA Multiple Award Schedule (awarded November 2022, $11 million ceiling through November 2027) carries 27 labor categories spanning Co-op Engineer Scientist at $45.04 per hour through Technical Staff V at $243.00 per hour, with no security-cleared roles offered.

Activity trajectory shows modest prime growth: six awards in 2022, three in 2023, then acceleration to fifteen in 2024 and ten in 2025, with one award in 2026 as of May. The two mega-IDIQs (SHIELD and updated Seaport-NXG awards in late 2025 and early 2026) represent structural inflection points in vehicle portfolio and potential value concentration. Of 483 total awards, SDI has obligated $165.6 million against $13.39 billion combined potential value (1.2% obligation rate), driven heavily by the mega-vehicle ceiling values. The vendor faces 123 task orders due to expire on legacy Army DAAH0190D0107 contract running through the next twenty-four months — a significant recompete exposure if that vehicle is not extended or replaced.

SDI operates as a prime on all named work; the source shows 19 sub awards (4% of portfolio) where SDI subcontracts to Torch Technologies Inc. for technical and engineering support on missile guidance and fire-control sensor systems (sensor-fusion, advanced imaging autotrackers, RF datalinks, and seekers modeling), and to Science Applications International Corporation for system software lifecycle engineering and DevSecOps modernization support. SCI-reportable invoicing on prime service contracts shows $14.7 million across FY2022–FY2024 (approximately $4.9 million per fiscal year) with FTE delivery ranging from 21.1 to 55.0 FTEs depending on reporting year, though the source data is sparse and covers only 9 SCI records across three years. Government-paid rates on prime SCI contracts clustered at a median of $107.48 per hour, with a 10th percentile of $104.51 per hour and a 90th percentile of $110.92 per hour. This tight rate band reflects standardized technical labor, not senior consulting rates. SDI does not rely on subcontractors on prime SCI records — all contractor hours on prime contracts were performed in-house.

SDI competes under women-owned small business set-asides on selected awards (Total Small Business on the SUAS flight training orders of May 2024 and the Soldier UAS sustainment order of July 2022), but the majority of recent prime wins come full-and-open, including the two mega-IDIQs and most PEO Aviation task orders. The vendor's set-aside posture is mixed: WOSB-primary on GSA OASIS+ vehicles, full-and-open on Seaport-NXG and SHIELD, and split across Army vehicles between set-asides and open competition.

SDI is a Woman Owned Small Business (WOSB) that provides services to the Department of Defense with a focus on manned and unmanned aviation training, simulation, operations, maintenance, and logistics both CONUS and around the globe.