GCS LLC (CO)
Registration and award facts
SAM.gov registration as of
- Net obligations since FY2008
- $25.40M
- $25,404,785under this UEI
- FY2026 obligations
- $2.97M†
- $2,966,818Provisional
- Awards and orders
- 146
- with positive net obligations10 IDV vehicles held
- Latest action
- Sep 11, 2026
- SAM.gov registration
- Active
- Registration expiration date Sep 23, 2027
Registration
- Entity structure
- Corporate Entity (Not Tax Exempt)
- Business start date
- Jan 1, 2008 (18 years)
- Location
- Loma, CO
- State of incorporation
- Colorado
- Purpose of registration
- All Awards
- Website
- gcs-llc.net
† FY2026 obligations (provisional; DoD awards signed after Jul 25, 2026 are not yet public).
Source: SAM.gov entity registration and FPDS contract actions recorded under UEI JJXLTLEU5UN5. GovChime does not check exclusions.
Performance
Net obligations recorded under this UEI since FY2008. Top lists show the largest five by share of this vendor's net obligations; the shares do not sum to 100%.
Net obligations by fiscal year of action
- FY2026: $2,966,818 (provisional)
- FY2025: $3,509,595
- FY2024: $1,450
- FY2023: $48,038
- FY2022: $2,701,050
- FY2021: $192,493
- FY2020: $653,488
- FY2019: $2,551,417
Show all 19 yearsEarlier years (FY2008–FY2018)
- FY2018: $3,194,610
- FY2017: $1,187,781
- FY2016: $634,579
- FY2015: $708,813
- FY2014: $1,181,161
- FY2013: $120,507
- FY2012: $1,888,338
- FY2011: $359,897
- FY2010: $1,284,399
- FY2009: $1,345,080
- FY2008: $875,273
Total across 19 fiscal years: $25,404,785
Top awarding agencies
- Department of Agriculture$11,548,753, 45.5%
- Department of Veterans Affairs$7,069,564, 27.8%
- Department of the Interior$5,407,906, 21.3%
- Department of Transportation$779,408, 3.1%
- Department of Labor$599,155, 2.4%
Top awarding sub-agencies
- Forest Service$11,548,753, 45.5%
- Department of Veterans Affairs$7,069,564, 27.8%
- Bureau of Land Management$3,044,009, 12.0%
- U.S. Fish and Wildlife Service$1,105,874, 4.4%
- Bureau of Reclamation$750,620, 3.0%
Top NAICS by obligations
- 237310Highway, street, and bridge construction$6,951,542, 27.4%
- 237990Other heavy and civil engineering construction$6,371,104, 25.1%
- 236220Commercial and institutional building construction$5,811,805, 22.9%
- 237110Water and sewer line and related structures construction$1,811,428, 7.1%
Top product and service codes by obligations
- Z2LBRepair or alteration of highways/roads/streets/bridges/railways$5,010,051, 19.7%
- Y1LBConstruction of highways, roads, streets, bridges, and railways$4,208,854, 16.6%
- Z141Maint-rep-alt/hospitals & infirmary$1,369,090, 5.4%
- Z2EDRepair or alteration of ship construction and repair facilities$1,279,252, 5.0%
- Y1PZConstruction of other non-building facilities$1,170,946, 4.6%
Capabilities
NAICS codes
- 236210Industrial Building Construction(primary)Small
- 562910Environmental Remediation ServicesSmall
- 238160Roofing ContractorsSmall
- 238310Drywall and Insulation ContractorsSmall
- 334220Radio and Television Broadcasting and Wireless Communications Equipment ManufacturingSmall
- 236220Commercial and Institutional Building ConstructionSmall
Show all 30 NAICS codes24 more NAICS codes
- 237120Oil and Gas Pipeline and Related Structures ConstructionSmall
- 238340Tile and Terrazzo ContractorsSmall
- 561730Landscaping ServicesSmall
- 237110Water and Sewer Line and Related Structures ConstructionSmall
- 238990All Other Specialty Trade ContractorsSmall
- 237990Dredging and Surface Cleanup ActivitiesSmall
- 238170Siding ContractorsSmall
- 237310Highway, Street, and Bridge ConstructionSmall
- 115310Fuels Management ServicesSmall
- 238140Masonry ContractorsSmall
- 238320Painting and Wall Covering ContractorsSmall
- 238330Flooring ContractorsSmall
- 238290Other Building Equipment ContractorsSmall
- 541519Information Technology Value Added ResellersSmall
- 238150Glass and Glazing ContractorsSmall
- 238350Finish Carpentry ContractorsSmall
- 237130Power and Communication Line and Related Structures ConstructionSmall
- 238910Site Preparation ContractorsSmall
- 238390Other Building Finishing ContractorsSmall
- 238190Other Foundation, Structure, and Building Exterior ContractorsSmall
- 238220Plumbing, Heating, and Air-Conditioning ContractorsSmall
- 238110Poured Concrete Foundation and Structure ContractorsSmall
- 238210Electrical Contractors and Other Wiring Installation ContractorsSmall
- 238130Framing ContractorsSmall
Small: small business for that NAICS, self-certified in SAM.gov registration.
SBA certifications
No certification in the SBA profile data.
Business types self-reported in SAM.gov registration:
- Veteran-Owned Business
- Service-Disabled Veteran-Owned Business
Federal Capability Statement
A CVE certified SDVOSB, design/build, heavy/civil engineering, CM/GC. Clients are VA Medical Center, Bureau of Rec and SM Stoller Corp. Authorized Varco Pruden steel building distributor, supplier and builder.
Capabilities & Services
Contracts
Latest awards and orders
- 1282B125C0008Definitive contractDepartment of AgricultureForest ServiceLatest action
- 1240LT25D0040Indefinite delivery contract (IDC)VehicleDepartment of AgricultureForest ServiceLatest action
- 1240LT26C0003Definitive contractDepartment of AgricultureForest ServiceLatest action
- 1240LP26F0025Delivery orderunder an indefinite delivery contract (IDC)Department of AgricultureForest ServiceLatest action
- 6982AF26P000014Purchase orderDepartment of TransportationFederal Highway AdministrationLatest action
- 140L1725C0004Definitive contractDepartment of the InteriorBureau of Land ManagementLatest action
- 1240LT26F0006Delivery orderunder an indefinite delivery contract (IDC)Department of AgricultureForest ServiceLatest action
- 1240LQ25D0010Indefinite delivery contract (IDC)VehicleDepartment of AgricultureForest ServiceLatest action
- 1240LT25C0019Definitive contractDepartment of AgricultureForest ServiceLatest action
- 1240LQ25F0015Delivery orderunder an indefinite delivery contract (IDC)Department of AgricultureForest ServiceLatest action
Contact Info
As of . Source: SAM.gov Points of Contact.
SAM.gov registration for GCS LLC lists a physical address and a separate mailing address, along with 6 verified points of contact. Past Performance contacts are the recommended outreach channel for due-diligence references; Government Business contacts handle procurement-facing correspondence.
Source: SAM.gov entity registration. Contacts displaying numeric or placeholder names have been filtered (defense-in-depth).
Physical Address
1360 Highway 6 and 50
Loma, CO, 81524
USA
Mailing Address
PO BOX 130
Loma, CO, 81524
USA
Government Business Contact
Mark S Mills
President
PO BOX 130
Loma, CO, 81524
USA
Electronic Business Contact
Casey A Mills
Vice President
PO BOX 130
Loma, CO, 81524
USA
Past Performance Contact
Casey A Mills
Vice President
PO BOX 130
Loma, CO, 81524
USA
Government Business Alternate Contact
Casey A Mills
Vice President
PO BOX 130
Loma, CO, 81524
USA
Electronic Business Alternate Contact
Mark S Mills
President
PO BOX 130
Loma, CO, 81524
USA
Past Performance Alternate Contact
Mark S Mills
President
PO BOX 130
Loma, CO, 81524
USA
Additional Details
As of . Source: SAM.gov Entity Registration.
GCS LLC has no active federal suspension or debarment on record in SAM.gov. Current SAM.gov registration expires September 23, 2027.
Source: SAM.gov entity registration (FAR responses, registration status). Always verify active exclusions against the authoritative record on SAM.gov before contract award.
Compliance & Risk Assessment
Source: SAM.gov FAR responsesSuspension/Debarment Status
SAM.gov registration reports no active exclusion
Public Display
Entity information is publicly displayed
Disaster Relief Registry
Registered for disaster relief contracting
Bonding Information
Bonding information on file
EDI
Not declared in SAM.gov
Business Structure
Source: SAM.govRegistration Details
Source: SAM.govInitial Registration
Last Update
Registration Activation
Fiscal Year End
Country of Incorporation
Congressional District
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