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Our Philosophy

“At All-Guard, we recognize that our strength and our competitive advantage is – and always will be – people. People working together to deliver excellence in sales and systems design, technical and administrative support, and monitoring center services. We understand that satisfied customers are essential to our success – therefore, the All-Guard team will remain committed to providing quality products and services, quality people, and above all, total customer satisfaction.”

Denis Cooke
President

Our History

All-Guard has been protecting homes, families, businesses, government buildings and schools from the threat of intrusion and fire. Established by the Cooke family in 1952, All-Guard has grown to be one of the largest independently owned and operated alarm companies in California for more than six decades. Today, All-Guard protects more than 15,000 commercial and residential customers – from Fortune 500 companies to the schools, homes and families in your community.

1952 All-Guard was established by John D. Cooke, a former NYPD police officer.
1979 John’s sons, John P. Cooke, Michael Cooke, and Denis Cooke join the family business. Denis Cooke is presently the President and CEO.
1980 All-Guard became a corporation.
1981 All-Guard moved its office to from Castro Valley, CA to Hayward, CA.
1983 All-Guard started to build a new 15,000 square foot campus in Hayward which included a UL-approved monitoring center.
1988 July – All-Guard purchased Western Alarm Company. Western served homes and businesses throughout the Fresno community.
1993 All-Guard made “Security Dealer Magazine’s” list of the Top 100 Alarm Companies in the Unites States. With the exception of 1994, All-Guard has been on the list every year since. Currently, All-Guard is ranked #49.
1995 January – All-Guard acquired Lenhart Alarms, a security company serving Hayward, Castro Valley, Oakland and the surrounding areas.
1997 May – All-Guard purchased Jericho Security, a San Jose based alarm company serving San Jose and the South Bay.
1998 All-Guard became a First Alert Authorized Dealer.
2001 All-Guard purchased Eye-On Security. Eye-On served the Greater Bay Area from their offices in San Leandro.
2002 April – All-Guard became Better Business Bureau (BBB) Approved. Currently, All-Guard has an A+ rating.
December – Denis’ daughter, Tara N. Cooke, joined the family business and is now VP of Operations.
2003 All-Guard expanded and added a second building to its campus.
June – All-Guard purchased Jacoa Alarm Systems, a Dublin-based security company protecting the Dublin/Livermore/Pleasanton area.
2005 July – All-Guard acquired Bel Alarm, a residential and commercial alarm company based in Belmont.
2008 April – John P. Cooke’s son, Sean Cooke, joined the family business and is now VP of Sales.
2009 May – All-Guard added a virtual receiver to its monitoring center. All-Guard continuously adds new technology to its monitoring center to better serve its customers.
July – All-Guard acquired California Systems Integrators, Inc. CSI was founded in 2001 and provided security systems in the San Jose area.
August – All-Guard launched All-Connect, your connection to your security system from anywhere in the world.
December – All-Guard acquired Binkley Alarm and opened a branch office in Santa Rosa, California to better serve its North Bay customers.
2010 March – All-Guard launched All-Vision, the future of security systems, which allows for enhanced video monitoring, verification, and dispatch.
April – All-Guard acquired the first 50% of Integrated Security Professionals, Inc. ISP was established in 2003 in San Ramon and served residential and commercial customers in the Greater Bay Area.
December – All-Guard launched its new and improved website to better serve existing and potential customers.
2011 June – All-Guard acquired Baye Security. Baye was established in 2005 and served Benicia and surrounding areas.
November – All-Guard purchased Alarm Express; a Stockton-based security company founded in 1989.
2012 June – All-Guard acquired McQuinn Security Systems. McQuinn was founded in 1998 and served the North Bay area out of their office in San Rafael.
August – All-Guard acquired the last 50% of the ISP; a San Ramon based security company.
September – All-Guard purchased Silent Guard Security, a Valley Springs based security company.
2013 July – All-Guard acquired Armor Clad Security. Armor was established in 2001 and provided security systems throughout the Modesto area.




1306 Stealth Street
Livermore, CA 94551
(800) 255-4273
*Calls to and from All-Guard may be recorded or monitored without further notice to you, for record-keeping, and quality-assurance purposes.
All-Guard
All Guard Alarm Systems, Inc., Security Systems Consultants, Hayward, CA
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