SOS Security, a provider of security personnel, has acquired First Security Services of San Jose, Calif.

First Security Services provides security solutions for industrial complexes, businesses, school districts, governments and healthcare facilities. Based in Silicon Valley, the company has seven offices and a team of 1,900 employees serving counties from Mendocino to Monterey, as well as the greater Central Valley.

“Having First Security become a part of SOS Security solidifies our position in Northern California,” said Edward B. Silverman, chairman and CEO of SOS Security. “The company, led by President Cal Horton, helps us to fulfill our strategic vision to acquire the best, like-minded companies to expand our resources in critical markets and strengthen our ability to service our clients.”

Horton said, “We are very pleased to join with SOS Security while continuing to provide for our client needs as we always have. Applying our combined talent, resources and domestic and global capabilities will lead to new and exciting opportunities for our clients and employees.”

First Security will operate as a subsidiary in SOS Security’s West Coast region, and Horton and his team will continue to spearhead the company’s growth in the California market. “We have reached this milestone thanks to the hard work and dedication of our employees,” Horton said.

“I am excited about the opportunities that First Security, along with our AS Solution Division, which has been serving Silicon Valley for more than 10 years, brings to SOS Security in the California market and beyond,” Silverman added.

Mitchell Silberberg & Knupp represented First Security throughout the negotiation and sale.