Greater Alarm Merges With Interface Security

Award-winning security integrator Greater Alarm Co. Inc.  has merged with St. Louis-based integrator Interface Security Systems Holdings Inc. In the deal, Interface becomes the majority shareholder of the Irvine, Calif.,  company. Greater Alarm will operate as a subsidiary of Interface with founder George De Marco continuing as president and COO.

Greater Alarm stretches Interface’s reach beyond its Midwest base and marks the continuance of an aggressive acquisition strategy that has seen the company involved in 21 transactions since the start of 2002. Interface, parent company of Interface Security Systems LLC, acquired Mississippi-based Phillips-Dolby Security Systems in September and added St. Louis’ Security Systems Inc. in February. Interface has indicated the Greater Alarm merger will be the start of further acquisitions in the California and Western markets.

De Marco said in a statement that the trend in the security industry has been for alarm companies to build their capital base. “We will require the technological, financial and human resources of a more substantial organization,” De Marco says. “Partnering with Interface is an important step forward for Greater Alarm, its employees and, most importantly, our valued customers.” Greater Alarm was founded by De Marco in 1981 and is one of the larger security companies in California. Greater Alarm is also one of the more prolific winners of Security Sales & Integration’s annual Sales & Marketing (SAMMY) Awards, including winning the grand prize for Residential Installation of the Year at the 2004 awards.

“George and [Executive Vice President] Jim De Marco have built an outstanding company over the years and we are pleased that they and the entire Greater Alarm team are now a part of the Interface family,” said Interface CEO Michael Shaw in a statement.


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