DDC 4C, LLC

DDC 4C, LLC, a tribally-owned, Native American-operated 8(a) certified small business based in Scottsdale, Arizona, provides environmental consulting, natural resource management, and infrastructure services to federal agencies as a prime contractor across habitat restoration, rangeland monitoring, archaeological assessment, and facility maintenance work. The vendor is a child entity of Dine Development Corporation, a federally recognized Indian Tribe holding tribally-owned firm designation; DDC 4C itself carries SBA 8(a) Program certification (valid through July 2033), Indian Economic Enterprise and Indian Small Business Economic Enterprise designations, minority-owned and small-disadvantaged-business status, and tax-exempt corporate structure. Recent awards split between Indian Small Business Economic Enterprise set-asides (particularly with the Bureau of Indian Affairs Navajo Region), Total Small Business set-asides for environmental work, and full-and-open competitive awards with civilian agencies.

DDC 4C's capability portfolio centers on environmental consulting, conservation planning, vegetation surveys, rangeland monitoring, archaeological and historic resource assessment, Best Management Practices maintenance, revegetation services, and facility infrastructure installation. Representative recent work includes a $3.79 million delivery order from EPA Region 7 (awarded October 2025, ultimate completion November 2028) for historic resource background studies and phase surveys at multiple Superfund sites in Kansas, Nebraska, Oklahoma, and Missouri; a $3.3 million delivery order from the U.S. Army Corps of Engineers (awarded September 2024, completion September 2026) for Best Management Practices maintenance and related services at Fort Liberty, North Carolina; a $1.22 million Bureau of Reclamation delivery order (awarded March 2025, completion December 2025) for revegetation services on the San Juan River reach restoration project in Bloomfield, New Mexico; a $478,280 Bureau of Indian Affairs vegetation survey (awarded July 2024, completion December 2025) covering 300,000 acres of District 18 across Arizona, New Mexico, and Utah; and a $249,480 Fish and Wildlife Service purchase order (awarded January 2026, completion November 2026) for hazard fuel reduction and pocosin management at Great Dismal Swamp National Wildlife Refuge in Virginia. Across this portfolio, DDC 4C operates as a 100% prime contractor with no subcontract work in the source data.

DDC 4C holds three significant parent vehicles. The NASA Environmental Support Services Blanket Purchase Agreement, a $225 million multiple-award BPA awarded May 2025 with performance through April 2035, is the vendor's largest ceiling vehicle; it has already generated task orders from the Army Corps of Engineers and Bureau of Reclamation. The GSA Federal Supply Schedule contract, awarded April 2024 with a $1.5 million ceiling through April 2029, carries 19 active labor categories spanning administrative and clerical support ($59.81/hr) through subject matter experts ($217.95/hr), with roles including archaeologists, GIS specialists, project managers, safety and health managers, and environmental consultants; all positions require a high school diploma through bachelor's degree with no security-cleared roles offered. The EPA Region 7 Indefinite Delivery Contract for Superfund historic and archaeological assessments carries a $3.79 million ceiling through November 2026. Recent delivery orders under the GSA Schedule include environmental remediation and consulting work for the Bureau of Reclamation, archaeological services under Total Small Business set-asides, and NEPA-related assessments.

Customer concentration is heavily weighted toward Interior Department bureaus and tribal agencies. The top five funding agencies by award count—the Bureau of Indian Affairs Navajo Region (5 awards, $1.2 million), EPA Region 7 (2 awards, $7.6 million), the Bureau of Reclamation (2 awards, $1.3 million), Indian Health Service (2 awards, $1.2 million), and the Bureau of Land Management Idaho Region (1 award, $320 thousand)—account for 71% of recent awards. By potential value, however, NASA Kennedy Space Center dominates with the $225 million NESS BPA (comprising 93% of combined potential value across all awards), followed by EPA Region 7 ($7.6 million), the Army Corps of Engineers ($3.3 million), Customs and Border Protection ($1.7 million), and the GSA Federal Acquisition Service ($1.5 million). The source data spans seventeen awards from April 2023 through January 2026, with eight awards in 2024, eight in 2025, and one in 2026; combined obligated dollars total $6.4 million against a combined potential value of $243.4 million. Seven awards carrying $4.5 million in combined potential value reach ultimate completion within the next twenty-four months, representing near-term recompete exposure.

Service Contract Inventory records in the source dataset show minimal SCI-reported activity—one record in FY2024 reflecting DDC 4C as a named subcontractor on a service contract. This SCI snapshot does not represent the vendor's full federal footprint; the bulk of DDC 4C's work appears in purchase orders, delivery orders, and BPA task orders not subject to SCI reporting thresholds or recordation requirements. Across the GSA Schedule, DDC 4C's labor pricing ranges from $59.81/hr for administrative support through $217.95/hr for senior subject matter experts, with mid-career environmental and archaeological specialists pricing between $91 and $140/hr.

DDC 4C delivers quality-driven environmental compliance services in support of federal, state, and local government and private sector clients. Our multidisciplinary team of scientists, engineers, and technical specialists engages their robust expertise to navigate complex regulatory structures. Our approach integrates project objectives with compliance requirements to yield client-tailored solutions. We work closely with our clients to develop responsive strategies that address environmental concerns while ensuring compliance with environmental requirements. DDC 4C has developed a proven record of excellence as a result of our steadfast commitment to quality management, risk mitigation, and cost savings.