Marstel-Day, LLC

Marstel-Day, LLC Principal Office Division, a woman-owned small business environmental consulting firm headquartered in Fredericksburg, Virginia, delivers environmental planning, natural resources management, shoreline and stream restoration, archaeological and cultural resources surveys, NEPA compliance, and facilities engineering services to the Department of Defense, Department of the Interior, and Army Corps of Engineers as a prime contractor (98% of recent awards) across full-and-open and set-aside vehicles. The firm operates as a limited liability company and competes across both total small business set-asides and full-and-open federal procurements.

Customer concentration is dominated by Army Corps of Engineers and Navy installations. The Department of the Army Corps of Engineers Engineering District Mobile anchors the portfolio with 79 awards totaling $479.3 million in combined potential value, while the Department of the Army Corps of Engineers (broader) carries six awards worth $253.5 million combined. The Department of the Navy Naval Facilities Engineering Command accounts for 97 awards ($105.9 million combined potential value) across environmental planning, environmental assessment, and infrastructure support. The Department of the Navy Installations Command (45 awards, $9.6 million) and U.S. Marine Corps (28 awards, $22.3 million) round out the top five, which together cover 58% of recent awards by count. The top customers by potential value show a heavier concentration in Army Corps of Engineers vehicles—the Mobile and Norfolk districts and corps-wide IDIQ work represent the majority of the vendor's dollar exposure.

Capability work spans environmental compliance, habitat restoration, ecological assessment, and facilities management. Representative prime delivery orders include a $5.29 million FY23 Dahlgren Shoreline Stabilization project with Naval Facilities Engineering Command for living shoreline construction and stream restoration (September 2023), a $3.2 million Cedar Point Phase I Alternative Test and Repair Revetment shoreline stabilization order at Naval Air Station Patuxent River (September 2025), a $1.44 million FY25 Regional Stream Restoration contract with Navy Installations Command (July 2025), a $249 million multiple-award IDIQ with the Army Corps of Engineers South Atlantic Division Mobile District for architect-engineer services covering environmental compliance, NEPA, conservation, master planning, and restoration design (December 2024, extending through December 2029), and a $45 million single-award IDIQ with Naval Facilities Engineering Command for environmental planning, natural resources management, and compliance services across Navy and Marine Corps installations (April 2022, extending through October 2027). A subsidiary, Marstel-Day / Atkins Mpjv, is structured as a small business joint venture with Atkins for delivery of facilities engineering work.

Parent vehicle position reflects deep entrenchment in Navy and Army contracts. Marstel-Day holds 78 task orders under Indefinite Delivery Contract N4008014D0002 ($14.7 million combined potential value) and 69 task orders under N4008022D0010 ($34.4 million), both Navy NAVFAC vehicles. The Multiple Award Schedule carries 37 task orders worth $1.08 billion combined potential value, reflecting the vendor's broad presence across interior-designed and architect-engineer delivery orders for civilian agencies including the Department of the Interior and National Park Service. The $249 million Army Corps of Engineers South Atlantic Division IDIQ (W9127808D0002) supports 27 task orders ($14.8 million) for regional National Guard facility assessments and BUILDER Sustainment Management System implementation. Marstel-Day also holds positions on the OASIS+ Small Business Multiple Award Contract (awarded December 2024, ceiling $999.999 billion, term through December 2029) within the Environmental Services functional domain and maintains a $30 million BPA with the Department of the Interior's National Office for Bureau of Land Management NEPA and national planning services (August 2023, term through August 2028).

Activity has declined over the past two years after a spike in 2023. Award counts ran 16 in 2022, peaked at 44 in 2023, then dropped to 28 in 2024 and 25 in 2025. Only one award appears in 2026 to date. Combined potential value across all 477 awards totals $2.27 billion, with $194.3 million obligated (9% of potential), reflecting the long-tail nature of indefinite-delivery vehicles and task-order-based work. Over the next twenty-four months, 47 awards carrying $24.8 million in combined potential value reach ultimate completion and face recompete, representing moderate near-term renewal risk.

Teaming favors subcontracting depth. Across all recent awards, Marstel-Day engages established subcontractors including EA Engineering (environmental remediation and site assessment), WSP USA Solutions (infrastructure and cultural resources assessment), Environmental Systems Analysis (wetland delineation and design), Tetra Tech (engineering and master planning), and Ecotone (ecological restoration and living shoreline construction). On SCI-reportable prime contracts, subcontractors account for an average 27% of total contractor hours, with two named subcontractors reported. SCI invoiced revenue totaled $1.5 million in FY2024 (zero in FY2023) across approximately 1.1 FTEs, reflecting partial coverage of the vendor's federal service-contract footprint; the SCI dataset excludes goods, products, and work below the $150,000 reporting threshold, and Marstel-Day's significant fixed-price task-order work skews toward short-duration orders that may not cross the SCI reporting line. Government-paid hourly rates on SCI-reportable work run median $519.58/hr, ranging from $343.56/hr (10th percentile) to $695.60/hr (90th percentile).

GSA Schedule labor portfolio spans 55 categories at rates from $42.99/hr (clerical, high school education, three years' experience) through $311.76/hr (senior executive consultant, PhD, twenty-five years' experience), with mid-range pricing in the $89–$153/hr band for junior and senior technical specialists, planners, and natural resources management roles. No security-cleared positions are offered on the schedule. The portfolio supports the firm's positioning as a civilian environmental and facilities consulting resource for federal agencies procuring project-based and staff-augmentation services.

In subcontractor capacity, Marstel-Day has engaged with The Rand Corporation on four NDRI institutional capacity-building research sub-awards (FY2023–FY2025, including travel support for work in Kosovo, Slovenia, and Moldova) and appears on environmental and engineering sub-awards to Mantech SRS Technologies, Arcadis U.S., and Tetra Tech. This sub volume is negligible relative to the prime footprint and reflects specialized research or technical-assistance roles rather than core repositioning toward feeder-level work.

Marstel-Day is a small business working to solve today's complex environmental and sustainability challenges around the world. Our scientists, planners, and engineers work collaboratively to bring innovative, creative, and cost-effective solutions for our clients' environmental and land use priorities. We specialize in environmental and community planning, mission sustainment, infrastructure, NEPA, natural and cultural resources, sustainability, ecosystem restoration, climate resiliency, GIS mapping/analyses, strategic planning, and stakeholder engagement.