HALF-LIFE SYSTEMS LLC (CT)
Registration facts
SAM.gov registration as of
- SAM.gov registration
- Active
- Registration expiration date Apr 20, 2027
Registration
- Doing business as
- Half-Life Systems
- Entity structure
- Other
- Business start date
- Jun 18, 2025 (1 year)
- Location
- Lyme, CT
- State of incorporation
- Connecticut
- Purpose of registration
- All Awards
- Website
- halflifesystems.com
Source: SAM.gov entity registration and FPDS contract actions recorded under UEI CZ73ZN9BEYH5. GovChime does not check exclusions.
Performance
Capabilities
NAICS codes
- 541715Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)(primary)
- 334519Other Measuring and Controlling Device ManufacturingSmall
- 541330Engineering Services
- 541380Testing Laboratories and ServicesSmall
- 541611Administrative Management and General Management Consulting ServicesSmall
- 541620Environmental Consulting ServicesSmall
Show all 11 NAICS codes5 more NAICS codes
- 541690Other Scientific and Technical Consulting ServicesSmall
- 541713Research and Development in NanotechnologySmall
- 541714Research and Development in Biotechnology (except Nanobiotechnology)Small
- 611430Professional and Management Development TrainingSmall
- 621111Offices of Physicians (except Mental Health Specialists)Small
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:
- Self Certified Small Disadvantaged Business
- Veteran-Owned Business
Product and service codes (PSC)
- AJ12General Science and Technology R&D Services; General science and technology; Applied Research
- AJ13General Science and Technology R&D Services; General science and technology; Experimental Development
- AN12Health R&D Services; Health care services; Applied Research
- B541SPECIAL STUDIES/ANALYSIS- DEFENSE
- B599SPECIAL STUDIES/ANALYSIS- OTHER
- R425SUPPORT- PROFESSIONAL: ENGINEERING/TECHNICAL
Federal Capability Statement
Half-Life Systems LLC provides applied research, technical analysis, engineering support, and clinical services within nuclear systems, radiation, space and defense systems, and neurology. Core capabilities include: -Fission power systems -Fusion power systems -Exposure and shielding analysis -Radiation effects on human physiology -Integration of medical considerations into nuclear and space system design -Clinical neurology The company supports SBIR/STTR efforts and subcontract work for NASA and DoD-aligned programs, contributing to concept development, technical analysis, and early-stage system design.
Contracts
Contact Info
As of . Source: SAM.gov Points of Contact.
SAM.gov registration for HALF-LIFE SYSTEMS LLC lists a physical address and a separate mailing address, along with 2 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
16 MEADOWLARK RD
LYME, CT, 06371
USA
Mailing Address
16 MEADOWLARK RD
LYME, CT, 06371
USA
Government Business Contact
Douglas C McAdams
Principal
16 Meadowlark Road
Old Lyme, CT, 06371
USA
Electronic Business Contact
Douglas C McAdams
Principal
16 Meadowlark Road
Old Lyme, CT, 06371
USA
Additional Details
As of . Source: SAM.gov Entity Registration.
HALF-LIFE SYSTEMS LLC has no active federal suspension or debarment on record in SAM.gov. Current SAM.gov registration expires April 20, 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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