Services · Installation

It’s a fact of life. To provide the best installations and service, you need the best people.

To this end, NSI has consistently recruited and developed our industry’s most skilled and talented personnel.

NSI’s experienced service and installation crews regularly stay abreast of all new products and technical information.





Expert technicians are trained in proper installation techniques of all of our products.

Systems can be installed during home construction or in finished houses.

All wiring is concealed where possible.

All National Security, Inc. employees are registered or certified by the Virginia Department of Criminal Justice Services (DCJS). This means each employee has been fingerprinted and had federal and state criminal background checks performed and has completed state approved training.

National Security, Inc.
10410 Main Street
Fairfax, Virginia 22030

VA: 703-273-5555
MD: 301-656-6466
Loudoun Co: 703-771-1000
Toll Free: 800-886-0886
Fax: 703-273-0885