We are one of the


GSA, DoD, Government Contracting Specialists

Serving Financial Institutions, Municipalities, Private Companies, State and Federal Agencies, Department of Defense, Medical Facilities, and Real Estate management companies, NSI is no fly by night operation. Having been in business for over forty years, our exemplary knowledge and service has earned NSI a reputation as one of the top security companies on the East Coast.

GSA Contract Safes and Locks

Security System Design, Installation & Repair


GSA GSA Certified Safe & Vault Service

  • Security container neutralization and repair under FED-STD-809B.
  • Materials compliant with Federal specifications FF-L-2740B.

Specialty Doors

Sound proof, explosion rated and fire rated doors as well as commercial and industrial grade interior and exterior doors.

Security Cameras (CCTV)

Video Surveillance Systems including IP & HD cameras offering cloud based solutions.

Access Control Systems

Stand- alone or integrated remote access control systems with the ability to manage a single door or multiple buildings.

Door Hardware

Commercial grade hardware including locks, levers, panic bars, knobs, and complete exit device systems.


Standard and high security keying systems including restricted & patented master key systems as well as key duplication, cylinder re-pinning and lock repairs.

NSI gets the

Job Done Right the First Time!

Our Qualifications

  • Duns #: 094277944
  • Cage Code: 1TQP9
  • MA S-License #: SS-002249
  • GSA Certified Safe & Vault Inspectors
  • S&G 2740B & 2890B Certification
  • Kaba Mas X-10 Certification
  • LKM 10K Certification
  • Overly Door Certifications: GSA Class 5 and AR 5 Vault Doors/Metal and Wood Bullet Resistant Doors/Metal & Wood Personal Size Acoustic Doors/Metal Fixed Acoustical Window Systems

Our trained and certified technicians provide the highest level of expertise to meet and exceed all levels of security for facilities requiring top level security clearances.


  • 562621: Security Systems Services (Except Locksmiths)
  • 561622: Locksmiths
  • 541690: Other Scientific & Technical Consulting Services; Security Consulting Services
  • 517311: Wired Telecommunications Carriers; Closed Circuit Television (CCTV)
  • 332321: Metal Window and Door Manufacturing
  • 238350: Finish Carpentry Contractors
  • 238290: Other Building Equipment Contractors
  • 238210: Electrical Contractors & Other Wiring Installation Contractors

Start Protecting Your Property TODAY

We provide installation and service Monday through Friday as well as repairs on an emergency basis to existing customers.