Services · Sales Information

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.




Sales Information

Sales staff:

Here at National Security, our professional sales staff is knowledgeable, professional, friendly and informative.  Our sales staff is held to the highest standards, and is kept up to date on the latest security needs of our customers.  Since all security needs are not the same, NSI does not offer “out of the box” systems.  We know that each customer has unique security needs.  Our sales staff will meet with you and discuss your needs, then a proposal will be submitted to you for review. 

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