MAINSTEM LLC (MD)
Registration and award facts
SAM.gov registration as of
- Net obligations since FY2019
- $35.96M
- $35,963,644under this UEI
- FY2026 obligations
- $500†
- Provisional
- Awards and orders
- 18
- with positive net obligations4 IDV vehicles held
- Latest action
- Jul 21, 2026
- SAM.gov registration
- Active
- Registration expiration date Aug 18, 2027
Registration
- Doing business as
- Blacklynx Services
- Entity structure
- Corporate Entity (Not Tax Exempt)
- Business start date
- Jul 28, 2010 (16 years)
- Location
- Rockville, MD
- State of incorporation
- Maryland
- Purpose of registration
- All Awards
† FY2026 obligations (provisional; DoD awards signed after Jul 26, 2026 are not yet public).
Contract actions that the Department of Defense both funds and awards are withheld at the source for 90 days, so DoD awards signed after Jul 26, 2026 are not yet public.
Source: SAM.gov entity registration and FPDS contract actions recorded under UEI SXHHGF88NPK4. GovChime does not check exclusions.
Performance
Net obligations recorded under this UEI since FY2019. 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: $500 (provisional)
- FY2025: $493,334
- FY2024: $4,136,606
- FY2023: $12,320,061
- FY2022: $13,981,149
- FY2021: $226,891
- FY2020: $4,591,355
- FY2019: $213,749
Total across 8 fiscal years: $35,963,644
Top awarding agencies
- Department of Defense$35,963,644, 100%
Top awarding sub-agencies
- Department of the Air Force$33,646,219, 93.6%
- Defense Advanced Research Projects Agency$2,316,925, 6.4%
- Missile Defense Agency$500, <0.1%
Top NAICS by obligations
- 541990All other professional, scientific, and technical services$31,557,734, 87.7%
- 541511Custom computer programming services$1,874,736, 5.2%
Top product and service codes by obligations
- R425Support- professional: engineering/technical$31,158,040, 86.6%
- AD93R&d- defense other: other (advanced development)$4,191,661, 11.7%
- 7021Information technology central processing unit (cpu, computer, digital)$399,694, 1.1%
- AC61R&d- defense system: electronics/communication equipment (basic research)$140,226, 0.4%
- AC21R&d- defense system: missile/space systems (basic research)$73,523, 0.2%
Capabilities
NAICS codes
- 541512Computer Systems Design Services(primary)
- 334111Electronic Computer Manufacturing
- 334112Computer Storage Device Manufacturing
- 334118Computer Terminal and Other Computer Peripheral Equipment Manufacturing
- 423430Computer and Computer Peripheral Equipment and Software Merchant Wholesalers
- 513210Software Publishers
SBA certifications
No certification in the SBA profile data.
Contracts
Latest awards and orders
- HQ085926FF036Delivery orderunder an indefinite delivery contract (IDC)Department of DefenseMissile Defense AgencyLatest action
- HQ085926DF358Indefinite delivery contract (IDC)VehicleDepartment of DefenseMissile Defense AgencyLatest action
- 47QTCA21D004MFederal supply schedule (FSS)VehicleGeneral Services AdministrationFederal Acquisition ServiceLatest action
- FA714623F0005Delivery orderunder an indefinite delivery contract (IDC)Department of DefenseDepartment of the Air ForceLatest action
- FA714623F0018Delivery orderunder an indefinite delivery contract (IDC)Department of DefenseDepartment of the Air ForceLatest action
- FA714622FB033Delivery orderunder an indefinite delivery contract (IDC)Department of DefenseDepartment of the Air ForceLatest action
- W52P1J22G0115Basic ordering agreement (BOA)VehicleDepartment of DefenseDepartment of the ArmyLatest action
- FA714622FB025Delivery orderunder an indefinite delivery contract (IDC)Department of DefenseDepartment of the Air ForceLatest action
- FA714623F0053Delivery orderunder an indefinite delivery contract (IDC)Department of DefenseDepartment of the Air ForceLatest action
- FA714623F0004Delivery orderunder an indefinite delivery contract (IDC)Department of DefenseDepartment of the Air ForceLatest action
Contact Info
As of . Source: SAM.gov Points of Contact.
SAM.gov registration for MAINSTEM LLC lists a physical address and a separate mailing address, along with 3 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
51 MONROE ST STE
PE5
ROCKVILLE, MD, 20850
USA
Mailing Address
51 MONROE ST STE
PE5
ROCKVILLE, MD, 20850
USA
Government Business Contact
Annie Bauler
7001 E Belleview Ave. Suite 1000
Denver, CO, 80237
USA
Electronic Business Contact
Annie Bauler
7001 E Belleview Ave. Suite 1000
Denver, CO, 80237
USA
Government Business Alternate Contact
Ellen Saunders
7001 E Belleview Ave. Suite 1000
Denver, CO, 80237
USA
Additional Details
As of . Source: SAM.gov Entity Registration.
MAINSTEM LLC has no active federal suspension or debarment on record in SAM.gov. Current SAM.gov registration expires August 18, 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
Not registered for disaster relief
Bonding Information
No bonding information provided
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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