EM4, LLC
EM4, LLC is a federal contractor, registered under UEI ELMKGCKJAM25 and CAGE code 3DNX8. It has been awarded $8,973,498 in federal contracts. Primary work spans Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing, Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology), and Fiber Optic Cable Manufacturing. Top awarding agencies include Department Of Defense (dod), Department Of Defense, and National Aeronautics And Space Administration.
Contact Information
Registration and classification details
Registration
UEI Code
ELMKGCKJAM25CAGE Code
3DNX8Entity Structure
Corporate Entity (Not Tax Exempt)Established
N/ABusiness Classifications
NAICS Codes
Federal Contracting Overview
Award totals, agency breakdown, NAICS distribution, and geographic footprint.
AI Capability Profile
EM4, LLC specializes in the design and manufacturing of high-performance photodetectors and fiber optic components for defense applications. Their core capabilities center on semiconductor device fabrication, particularly in developing packaged 22 GHz high-power photodetectors with precise optical a...
EM4, LLC specializes in the design and manufacturing of high-performance photodetectors and fiber optic components for defense applications. Their core capabilities center on semiconductor device fabrication, particularly in developing packaged 22 GHz high-power photodetectors with precise optical and electrical specifications, including 5 GHz bandwidth and 200 mA photocurrent output across 50 and 75 micron diameter active areas. They also produce passive optical components such as 2x8 fiber optic splitters, demonstrating expertise in integrated photonics, low-loss optical coupling, and precision microfabrication. Their technical proficiency spans optoelectronic device packaging, RF-photonic integration, and fiber optic network component manufacturing, with a focus on ruggedized, high-reliability systems meeting stringent military environmental and performance standards. The company maintains a consistent relationship with the Department of Defense, delivering mission-critical optical and semiconductor subsystems for sensing, communications, and electronic warfare platforms. Their work supports advanced radar, directed energy, and secure data link systems requiring high-bandwidth optical-to-electrical conversion and signal integrity under extreme conditions. EM4, LLC operates within NAICS 334413 for semiconductor device manufacturing and 335921 for fiber optic cable manufacturing, positioning itself as a niche supplier of mission-essential photonic components. They serve the defense electronics supply chain with specialized, low-volume, high-complexity products that require tight tolerances and radiation-hardened or temperature-stable designs. As a small business structured as a 2L entity based in Bedford, Massachusetts, EM4, LLC leverages its regional access to defense R&D ecosystems and precision manufacturing infrastructure. While currently holding no formal government certifications, their technical execution and focus on defense-grade photonics establish a credible footprint in the national security technology sector.
Key Performance Metrics
Awards Count
91
All time
Active
1
Currently performing
Completed
90
Past period of performance
Total Awards
All time
Contracts
Prime · all time
Subcontracts
Sub · all time
Grants
Prime · all time
Subgrants
Sub · all time
Award Analytics & Distribution
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