About NSI Security
Built on Service. Driven by Mission.
NSI Security is a Service-Disabled Veteran-Owned Small Business delivering professional physical security solutions to government agencies, commercial facilities, and institutional clients across the eastern United States.
Our Mission
To protect the people, assets, and operations of every client we serve — with the discipline, integrity, and accountability that comes from a team rooted in military service. We bring the same commitment to mission success on every job site that our founders carried in uniform.
Credentials & Certifications
Business Designation
Service-Disabled Veteran-Owned Small Business (SDVOSB)
Contract
GSA Schedule coming soon
Technician Certification
GSA-Certified Safe & Vault Technicians, Licensed Low Voltage Technicians, Licensed Locksmith
Industry
Physical Security Systems & Locksmithing
Our Home Base
Headquartered in Littleton, MA
Our main office is located at 7 Taylor Street in Littleton, Massachusetts — the hub from which our team of licensed, veteran technicians serves commercial, industrial, and government clients across New England and beyond.
What We Stand For
Integrity
We do what we say, document what we do, and stand behind every installation and service call — no exceptions.
Accountability
Every technician on every job is responsible for the outcome. We don't pass problems down the line.
Expertise
Our team holds GSA certifications, manufacturer credentials, and years of field experience across government and commercial environments.
Responsiveness
Security issues don't wait for business hours. We respond quickly, communicate clearly, and resolve problems efficiently.
Where We Work
NSI operates from three regional offices, allowing us to serve federal, state, and commercial clients across the Northeast, Southeast, and National Capital Region.
Massachusetts
7 Taylor St, Littleton, MA 01460 — our founding headquarters serving New England.
South Carolina
475 Sandy Lane, Suite E, Surfside Beach, SC 29575 — serving the Southeast.
Northern Virginia
National Capital Region — serving the greater DC metro and DoD corridor.
Let's Talk About Your Security Needs
Whether you're a federal agency, a commercial property manager, or a business owner, NSI Security Systems is ready to help.
Learn more about government procurement on our GSA & DoD contracting page.