Sol Engineering Services, LLC

Sol Engineering Services, LLC, a HUBZone-certified small disadvantaged business headquartered in Jackson, Mississippi, delivers engineering analysis, technical consulting, laboratory testing, research support, and administrative services to the U.S. Army Corps of Engineers as a prime contractor on nearly all federal work (99% of recent awards). The company is minority-owned and black American-owned, competing predominantly under HUBZone set-asides and full-and-open procurements across its prime footprint.

Sol's customer concentration is extreme and deliberate. The Department of the Army Corps of Engineers' Engineer Research and Development Center (ERDC) accounts for 381 awards valued at $210.6 million combined potential value—roughly 70% of the vendor's total $299.6 million combined potential across all awards. The top five Army Corps customers (ERDC, Engineering District Vicksburg, Engineering District Galveston, Army Corps headquarters, and Engineering District New Orleans) represent 95% of recent awards and 89% of combined potential value. This concentration anchors Sol's entire federal business model to a single customer family and a single geographic footprint in Vicksburg, Mississippi, where virtually all work is performed.

Sol's capability portfolio centers on specialized technical services for the Army Corps' research and development mission. Representative prime work includes airfield and pavement analysis support services ($430,325), transportation infrastructure construction and testing ($453,957), asphalt and materials laboratory testing, soil and aggregate laboratory analysis, railroad evaluation and testing, concrete mixture proportioning, and airfield CAD support—all firm fixed-price delivery orders under multiple indefinite delivery vehicles. The vendor also delivers administrative support for the Army Dams and Transportation Infrastructure Program (ADTIP), High Performance Computing Modernization Program (HPCMP) support services including business analytics and communications support, and technical editing and editorial services for ERDC's research documentation. A smaller cohort of work involves field sampling, infrastructure evaluation, facilities maintenance, and scientific research support across multiple Army Corps districts and engineering centers.

Sol holds four active indefinite delivery vehicles anchoring its prime posture. The largest, a $24.9 million single-award HUBZone contract with ERDC for HPCMP support services (ultimate completion April 2028), has generated numerous delivery orders for labor and administrative support. Two GSA vehicles—the OASIS+ Total Small Business IDIQ (awarded December 2024, $999,999,999,999 ceiling, HUBZone multiple-award, through December 2029) and the OASIS+ HUBZone Small Business IDIQ (awarded September 2024, same ceiling, through September 2029)—provide governmentwide platforms, though Sol has issued no recorded task orders against them to date. Most recently, Sol was awarded a $151 billion Missile Defense Agency SHIELD contract (December 2025, full and open, through December 2035) with only a $500 initial delivery order as of the source date. A $20 million single-award HUBZone IDC with ERDC for Geotechnical and Structures Laboratory support (awarded August 2025, through August 2030) rounds the vehicle portfolio. Five subsidiary ERDC IDCs (W912HZ11D0005, W912HZ15D0001, W912HZ20D0006, and others) collectively generated 315 task orders valued at approximately $42.7 million, representing Sol's historical prime delivery infrastructure.

Activity has remained flat to slightly declining year over year—27 awards in 2023 and 2024, 28 in 2025, and 11 in the first half of 2026. Eighteen awards with ultimate completion dates in the next twenty-four months carry combined potential value of $7.1 million, representing modest recompete exposure. SCI-reported invoicing is minimal and sub-only: the vendor appears in the Service Contract Inventory as a named subcontractor on 11 records spanning FY2022–FY2024 with roughly 3 FTEs delivered in FY2024, suggesting Sol operates primarily as a prime and does not systematically subcontract federal service work to larger primes or serve as a feeder into prime ecosystems. However, Sol does subcontract on a small cohort of disaster-recovery work—four sub-awards under Ch2M Hill CDM Pa-Tac Recovery Services for administrative management and general management consulting across Region VII multiple disasters (awarded June 2025, April 2025, January 2025, and November 2024), indicating emerging capability or opportunistic engagement in FEMA recovery contracting.

Sol maintains a three-subsidiary corporate structure: Sol-Imri Joint Venture LLC, Sol-Merrick Joint Venture LLC, and Sol-Merrick Joint Venture II LLC, all HUBZone joint ventures with minority and small disadvantaged business certifications. These entities appear to serve as partnership vehicles rather than distinct operating units with separate federal business lines; the primary award stream flows through the parent.

On GSA Schedules, Sol lists 266 active labor categories spanning $25.92 to $251.61 per hour, with no security-cleared roles. The spectrum ranges from entry-level CAD operators ($25.92/hr, high school) through senior environmental engineers ($52.96/hr, bachelor's), survey technicians ($66.42/hr), scientists ($81.78/hr, master's), geologists ($105.36/hr), civil engineers ($124.85/hr), and principals ($251.61/hr, bachelor's with 20 years' experience). The breadth of categories reflects the vendor's technical bench but carries no strategic defense or intelligence work—all roles are non-classified and carry no clearance requirements.

Categorically, Sol's work splits across Other Scientific and Technical Consulting Services (338 awards, 57% of award count), Engineering Services (83 awards), Administrative Management and General Management Consulting Services (46 awards), Environmental Consulting Services (35 awards), and Professional Scientific Services (24 awards). By PSC, Support–Professional: Other dominates (378 awards), followed by Architect and Engineering–General (51 awards) and Special Studies/Analysis–Environmental Assessments (37 awards).

Sol's federal posture is a narrow, deep bet on ERDC and the Army Corps of Engineers. The vendor is operationally efficient within that niche—established, predictable, and positioned to capture task orders across multiple ERDC IDCs—but faces structural risk from customer concentration, geographic concentration in Vicksburg, lack of classified capability, and absence of prime relationships outside the Corps family. The recent MDA SHIELD award signals intent to diversify, but execution remains unproven and the $500 initial delivery order suggests minimal near-term revenue. The vendor's SCI footprint (sub-only, minimal FTEs) and small disaster-recovery sub activity do not materially change the characterization: Sol is an ERDC-dependent prime, not a diversified federal contractor or a significant feeder subcontractor to defense primes.

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