Sol Engineering Services, LLC

Sol Engineering Services, LLC, a Jackson, Mississippi–headquartered HUBZone-certified small disadvantaged business and minority-owned (black American-owned) firm, operates as a prime contractor delivering engineering analysis, technical consulting, laboratory testing, and research support services almost exclusively to the Army Corps of Engineers. The vendor is an SBA-certified HUBZone firm competing predominantly under set-aside vehicles—approximately 99 percent of recent awards are prime contracts, with negligible subcontractor exposure, and the vendor operates across four named joint-venture subsidiaries (Sol-Merrick Joint Venture LLC, Sol-Merrick Joint Venture II LLC, and Sol-Imri Joint Venture LLC), all black American-owned and HUBZone-certified joint ventures.

Sol's customer concentration is extreme. The top five Army Corps districts and commands account for 95 percent of awards by count: the Engineer Research and Development Center alone anchors 388 delivery orders valued at $215 million combined potential value—approximately 69 percent of the vendor's entire $310.9 million portfolio. Engineering District Vicksburg follows with 94 awards ($20.6 million), and Engineering District Galveston, the umbrella Army Corps of Engineers, and Engineering District New Orleans round out the active set. Work is performed at the ERDC facility in Vicksburg, Mississippi, and at subordinate Army Corps district offices in the Southeast. This concentration is both a strength (deep embedded relationship, predictable task-order pipeline) and a recompete risk: nineteen awards with combined potential value of $7.7 million expire within the next twenty-four months.

Sol's IDV portfolio anchors its federal posture. The vendor holds a $24.9 million single-award HUBZone indefinite-delivery contract with ERDC for High Performance Computing Modernization Program support services (ultimate completion April 2028), which has generated at least fourteen delivery orders for communications analyst positions, strategic communications labor, business operations analytics, and financial business analytics. The vendor also holds a recently awarded $20 million single-award HUBZone contract with ERDC for Geotechnical and Structures Laboratory support, covering structural dynamics, material science, physics, geophysics, administrative assistance, computational analysis, technician work, grammatical and technical editing, and research aid (completion August 2030). Two OASIS+ vehicles—OASIS+ Total Small Business (General Services Administration, multiple award, $999 trillion ceiling, completion December 2029) and OASIS+ HUBZone Small Business (GSA, multiple award, $999 trillion ceiling, completion September 2029)—represent governmentwide ordering vehicles with no recorded task orders issued to date, but both carry HUBZone set-asides matching Sol's competitive posture. Most recent delivery-order work spans airfield pavement analysis, thermomechanical modeling, concrete and materials branch support, soil and aggregates laboratory testing, communications analyst positions, administrative services, design review, transportation infrastructure testing, and GSL editorial services, with order values typically ranging from $50,000 to $450,000 and firm fixed-price structures.

Beyond the Core Army Corps footprint, the vendor was awarded a $151 billion multiple-award IDIQ by the Missile Defense Agency on December 29, 2025, under the Scalable Homeland Innovative Enterprise Layered Defense (SHIELD) program, with an initial delivery order of $500 placed in December 2025. This award, without set-aside designation and under full-and-open competition, represents Sol's first material position on a non-Army Corps, non-set-aside vehicle of scale and signals expansion beyond the Jackson-to-Vicksburg geographic and organizational footprint. A $7 million Blanket Purchase Agreement was also established with ENDIST Jacksonville (April 2026) against the GSA Multiple Award Schedule for project delivery and business process support within the South Atlantic Division area of responsibility, indicating geographic and customer diversification.

Sol's GSA Schedule labor portfolio spans 271 active categories priced from $25.92/hr (CAD operators with high school education and five years' experience) to $251.61/hr (principals with bachelor's degree and twenty years' experience). Representative mid-range labor includes GIS specialists at $106.78/hr, hydrologist technicians at $85.12/hr, and senior scientists with PhDs at $127.33/hr. No security-cleared roles are offered on the GSA Schedule. The rate spectrum reflects technical and scientific labor depth suited to ERDC's research and development mission.

Award activity has remained relatively flat in recent years—twenty awards in 2022, twenty-seven in 2023, twenty-seven in 2024, twenty-eight in 2025, and nineteen through August 2026—indicating a sustained but not expanding customer relationship. Service Contract Inventory reporting shows minimal sub-engagement: SCI records the vendor as a named subcontractor on nineteen contracts across fiscal years 2022–2025 (zero as prime on SCI-reportable contracts), with roughly 3 FTEs in FY2024 and 2.9 FTEs in FY2025. This suggests Sol's federal services work is heavily concentrated on non-reportable task orders under the Army Corps IDIQs and does not reflect the full scope of the vendor's federal services activity.

The vendor's sub-award footprint is negligible: four sub-awards in the source, all to Ch2M Hill–CDM (now Jacobs Engineering Group) under a FEMA Disaster Recovery contract (PA TAC V Region VII Multiple Disasters Support, dating from November 2024 through June 2025) for administrative management and general management consulting services. This represents a departure from Sol's core Army Corps work and a single prime relationship in the sub-contractor role.

Recent activity indicates Sol is bidding into full-and-open competition (the SHIELD IDIQ and the GSA Multiple Award Schedule BPA), while simultaneously deepening its HUBZone set-aside posture on Army Corps vehicles. The recompete cliff of $7.7 million in the next twenty-four months is modest relative to the portfolio and is offset by the $24.9 million HPCMP contract and $20 million GSL contract anchoring the ERDC relationship through 2028 and 2030 respectively. Corporate structure and joint-venture subsidiaries are positioned for minority-set-aside pursuit and for potential teaming arrangements on larger primes, though no recent joint-venture award activity is visible in the source.

SOL Engineering specializes in engineering, construction phased services, project/program management, quality assurance, Environmental Services, admin. support, facility support and logistics management and information technology.SOL Engineering is ISO-9001:2015 and ISO-14001 Certified