Xsite LLC

Xsite LLC, doing business as Xpert Systems Integration And Technology Engineering, is a service-disabled veteran-owned small business (SDVOSB) and SBA-certified veteran-owned small business headquartered in San Diego, California, that delivers systems engineering, modeling and simulation, and advanced defense technology integration services to the Department of Defense as a prime contractor (79% of recent awards) and subcontractor on Navy C4I and program management efforts. The company competes predominantly full-and-open rather than under set-asides, though small-business set-asides appear on roughly half of recent prime definitives, including SBIR Phase I awards; the only large IDIQ in Xsite's footprint carries no set-aside designation.

Xsite's customer concentration is overwhelmingly Navy and Air Force. The top five DoD customers account for 93% of recent awards by count, with the Department of the Navy Naval Sea Systems Command anchoring the portfolio at $3.96 billion combined potential value across four awards—a ceiling driven entirely by Xsite's January 2026 award to the Missile Defense Agency on the Scalable Homeland Innovative Enterprise Layered Defense (SHIELD) multiple-award IDIQ, which carries a $151 billion ceiling and an ultimate completion date of December 28, 2035. Beyond the SHIELD vehicle, Xsite holds a $9.28 million delivery order under Seaport Next Generation (Seaport-NXG) with Naval Information Warfare Systems Command for 50E CHENG support services (performance through November 2029), and a $23.3 million definitive contract with Air Force Space and Missile Systems Center for MILSATCOM modeling and simulation tool operations and sustainment (cost-plus-fixed-fee, performance through June 2029). Xsite also carries a $3.84 million Air Force contract for modeling and tool development (closed-out July 2024) and two small-business SBIR efforts: a $240 thousand Marine Corps SBIR Phase I extension (ultimate completion May 2026) and a $180 thousand Air Force Research Laboratory SBIR Phase I for MUOS testing and simulation expansion (completed January 2025). The Seaport-NXG vehicle hosts four task orders totaling $9.3 million across Xsite's prime footprint.

Activity remains sparse and episodic. Two awards arrived in 2026, one in 2025, four in 2024, and one each in 2023 and 2022, with only $20.8 million obligated against $4 billion in combined potential value—a 1% obligation rate reflecting the early-stage nature of the SHIELD IDIQ and the long tails of performance contracts running through 2029 and 2035. In its subcontractor capacity, Xsite provides systems engineering and program management support under Booz Allen Hamilton (C4I and shore-and-expeditionary system engineering; two awards, 2021–2023) and professional support services under Accelint Mission Solutions (Naval Information Warfare operations and sustainment; September 2024). Across SCI-reportable federal service contracts, Xsite delivered roughly 0.8 FTEs in FY2025 and 3.8 FTEs in FY2024, operating primarily as a named subcontractor to larger primes rather than as a SCI-captured prime invoicer—no SCI-reported invoiced revenue is captured in the data for Xsite as a prime contractor across all fiscal years in the source. The company's technical footprint centers on defense research and development, systems modeling and simulation, satellite communications and command-and-control architecture, electromagnetic interference analysis, and operational planning support, with work performed at Cheyenne Mountain Air Force Base, Colorado; Huntsville, Alabama; and San Diego, California.

XSITE LLC was founded in December, 2014 as a Service Disabled, Veteran Owned Small Business providing technical services to the Department of Defense (DoD) and the Intelligence Community (IC). XSITE specializes in enterprise systems integration, system engineering, and modeling and simulation for complex hardware and software acquisitions. We are also engaged in scouting and evaluation of emerging technologies for various defense and commercial applications. We are a company of approximately 30 engineers, architects, and military veterans who have specified, modeled, built, integrated, deployed, and operated the nation's most complex enterprise systems. Headquartered in San Diego, California, XSITE also has an East Coast Office located in Royersford, PA and employee presence in Colorado, Virginia and Florida.