First Alarm, Aptos, Calif., has purchased Pierson Security Systems, Monterey, Calif. First Alarm is a private corporation, offering installation, service, monitoring, and guard and patrol services to both the San Francisco Bay area and the Monterey Bay area. With approximately 500 employees, First Alarm will focus on consolidating the operations of both companies.

“Our primary focus will be to make all of Pierson’s customers and employees feel welcome and to make sure service levels are kept at the high level Hugh and Audrey Pierson delivered over the years,” said Dave Hood, First Alarm vice president and general manager.