Longenecker & Associates, LLC

Longenecker & Associates, LLC, a woman-owned small business based in Las Vegas, Nevada and headquartered operationally in Los Alamos, New Mexico, delivers project management, technical analysis, environmental remediation support, and contingent labor services to the Department of Energy (DOE) complex as both a prime contractor (76% of recent awards) and as a subcontractor to major DOE M&O primes. The vendor is a subsidiary of Geosyntec Consultants, Inc., a consulting firm specializing in environmental and engineering services. Longenecker competes primarily in the full-and-open market on GSA Schedule vehicles and OASIS+ IDIQs rather than through set-asides; recent prime work spans the Multiple Award Schedule, OASIS+ Unrestricted, and OASIS+ Total Small Business, with no set-aside designations applied to its largest contract vehicles.

Longenecker's customer base is heavily concentrated within the DOE complex. The top five funding agencies account for 86% of recent awards by count but a different concentration by dollar value — GSA Federal Acquisition Service anchors 96% of combined potential value through five IDIQ and Schedule awards ($588 million), while the DOE National Nuclear Security Administration (32 awards, $288.7 million combined potential value) and DOE Office of Environmental Management (40 awards, $44.8 million) represent the next two tiers. This divergence reflects Longenecker's strategy: it holds a multi-billion-dollar ceiling OASIS+ Unrestricted IDIQ and a comparable OASIS+ Total Small Business IDIQ (both awarded December 2024), which carry placeholder ceilings but generate significant potential value through GSA's reporting conventions, while its operational revenue concentrates on NNSA and EM task orders. Recent capability work includes a $3.75 million NNSA delivery order (March 2026) for project management and technical analysis support on a new bridge contract under MAS, a $499,278 NNSA delivery order (January 2025, ongoing through December 2027) for tritium R&D technical subject-matter expertise, and a $409,639 DOE BPA call for project management and technical support services (March 2026).

Longenecker places task orders under the Federal Supply Schedule GS10F0479N (37 task orders, $347.9 million combined potential value), a dedicated BPA under that schedule (19 task orders, $42.7 million), the GSA Multiple Award Schedule (16 task orders, $36.4 million), and Federal Supply Schedule GS10F111AA (9 task orders, $38.1 million). The vendor's OASIS+ positions add capacity for future growth but have not yet generated material task orders in the source data window. Activity trended upward from 2019 through 2025 — two awards in 2019, eight in 2024, and eleven in 2025 — with only three awards reaching ultimate completion in the next twenty-four months (combined potential value $4.7 million), indicating minimal near-term recompete exposure.

Longenecker's subcontractor footprint concentrates on DOE M&O primes. The vendor delivers technical services, quality assurance and testing support, mission assurance, leadership training, and business operations coaching to Hanford Tank Waste Operations & Closure, LLC under the Integrated Tank Disposition Contract (multiple sub awards from February through April 2025), to Triad National Security, LLC on the Los Alamos National Laboratory M&O contract (translation, graphic design, and contingent labor, July 2024 and earlier), to Mission Support & Test Services LLC for Nevada National Security Site infrastructure support (June 2026), and to Central Plateau Cleanup Company, LLC for Hanford groundwater operations business coaching (December 2023). The vendor also subcontracts to unspecified primes on the Los Alamos Legacy Cleanup Contract and Waste Isolation Pilot Plant operations, performing quality assurance, testing, and mission support services. Across SCI-reportable prime contracts, subcontractors account for 10% of contractor hours, and Longenecker typically builds its own delivery teams; twelve named subcontractors appear across the SCI dataset, primarily on environmental and engineering support work.

SCI-reported invoicing on federal service contracts above the $150,000 threshold shows a declining trajectory: $11.7 million across 28.2 FTEs in FY2022, declining to $3.8 million across 9.5 FTEs in FY2025, reflecting a shift in work mix or contract structures rather than exit from federal markets. Government-paid hourly rates on prime contracts run a median of $177.14 per hour, with rates spanning $153.38 to $208.10 per hour across the 10th to 90th percentile range. The GSA Schedule labor portfolio spans 45 categories from data-entry roles at $33.59 per hour through executive consultants at $399.88 per hour, with no security-cleared positions offered; most roles require a bachelor's degree and zero to thirty years of experience. Longenecker's capability portfolio centers on environmental remediation, project management, technical analysis, and contingent labor for the federal laboratory and environmental cleanup sectors, with minimal defense exposure and no classified work in the source record.