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Providing Security Solutions for Over 60 Years

For over 60 years, Foster Brothers Security Systems has provided businesses and industrial sector clients with the security solutions they need and deserve. Our company is located in the heart of Silicon Valley, and we’re proud to satisfy the many security and locksmith requirements our clients have.

As the valley has grown, so has our business. We serve the needs of hundreds of customers across the Greater San Francisco Bay Area, providing them with a range of security products and solutions including: locks and keys, access control systems, and access control devices. Our clients include some of the biggest companies in the country. We take deep pride in providing all our customers with honest, fast, professional, and economical lock and access control installation services and solutions.

For more information about the range of security products we carry, or for general questions about our services, please contact us by filling out a contact form or by giving us a call at 408-736-4500 or toll-free at 1-800-929-3938 today.

We look forward to hearing from you!

Security systems provider in Sunnyvale, CA | Foster Brothers Security Systems


Office Hours

Mon: 8:00 am – 5:00 pm
Tues: 8:00 am – 5:00 pm
Weds: 8:00 am – 5:00 pm
Thurs: 8:00 am – 5:00 pm
Fri: 8:00 am – 5:00 pm

*24 Hour Emergency Services Available