Ya Engineering Services, LLC

Ya Engineering Services, LLC, a for-profit limited liability company based in St. Louis, Missouri, operates as a prime contractor delivering expert witness services and materials-testing analysis to federal agencies on a full-and-open, non-set-aside basis. The vendor holds three recent prime awards across the Department of Justice (US Attorney's Offices) and the Department of Commerce (National Institute of Standards and Technology), with combined potential value of $254 thousand and $224 thousand obligated to date.

The vendor's customer footprint is split evenly by dollar value between NIST and the US Attorney's Offices. NIST anchors the largest single award: a $198,717.50 firm fixed-price purchase order for invasive testing and evaluation of concrete quality via petrographic analysis, supporting NIST's investigation into the structural failure of Champlain Tower South in Surfside, Florida. Performance occurred in St. Louis, Missouri, with an ultimate completion date of September 30, 2026. The US Attorney's Offices hold two time-and-materials purchase orders for expert witness services—a $30 thousand order awarded May 6, 2026 (completion December 31, 2026) and a $24,790 order awarded August 5, 2025 (completion August 4, 2027), both performed in the St. Louis area.

Award activity is sparse and episodic—one award in 2023, one in 2025, one in 2026—rather than growth-trending. All three awards face ultimate completion within the next twenty-four months and therefore expose the vendor to recompete risk across its full current footprint. The vendor operates exclusively as a prime contractor; it carries no subcontract relationships in the source data. Work classifies under two primary NAICS codes: All Other Legal Services (expert witness, two awards) and Other Scientific and Technical Consulting Services (petrographic analysis, one award).