Known for three decades of perimeter-security work, Concentric Security & Construction is a security integrator serving government, defense, commercial and other critical facilities. Its team includes board-certified Physical Security Professionals and professional engineers, and the company carries projects from site assessment through construction while maintaining more than 100 service contracts.
UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings
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UFC 4-020-01 DoD Security Engineering Facilities Planning Manual
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UFC 4-022-01 Security Engineering: Entry Control Facilities/Access Control Points
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UFC 4-022-02 Selection and Application of Vehicle Barriers
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UFC 4-022-03 Security Engineering: Fences, Gates, and Guard Facilities
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PBS-P100 8.0 Facilities Standards for the Public Building Service
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CFATS Chemical Facility Anti-Terrorism Standards Risk-Based Performance Standards Guidance
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ASTM F2656-07 Standard Test Method for Vehicle Crash Testing of Perimeter Barriers
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Army Access Control Points Standard Design/Criteria
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UFGS 34.41.26.00.10 Unified Facilities Guide Specifications — Access Control Point Control System
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Intellimar, IncFounded in 1996, Intellimar is a Maryland-based parent company that integrates perimeter-security solutions and manufactures physical safety products through its businesses Concentric Security and MaxiForce. Its roots are in industrial security, while its portfolio includes MaxiForce’s patented collapsible bollard, made in the United States. Intellimar employs more than 100 people and holds a GSA Federal Supply Schedule for force-protection and homeland-security solutions.SYKESVILLE, MD
Securityhunter, IncFounded in 1988, Securityhunter, Inc. designs, installs, integrates, and sustains electronic and physical security systems for government facilities and missions. The Baltimore company works across the full security lifecycle, from engineering through modernization, with a record that includes prime federal contracts and support for defense and civilian agencies. Securityhunter became employee-owned through an ESOP in 2021, bringing its ownership model directly into its long-term approach to federal security work.WINDSOR MILL, MD
Nasatka SecurityFounded in 1975 by Army Korean War Veteran Ralph Nasatka, Nasatka Security is a Maryland company known for pioneering practical protection against hostile vehicle intrusion. Its first active vehicle barrier was installed at FBI headquarters in Washington, D.C., and the company now designs and manufactures perimeter-security systems for sensitive government and commercial facilities worldwide. Fabrication has been based in the United States since its 2019 merger with Apex Fabrication and Design.CLINTON, MD