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About Us


AlliedBarton Security Services, headquartered in Conshohocken, PA is the industry's premier provider of contract security services in the United States. We have been providing quality security services and highly trained personnel since 1957 to clients in a number of industry sectors, including commercial real estate, higher education, healthcare, residential communities, manufacturing and industrial, financial institutions, shopping centers and other commercial facilities.

Over the years, AlliedBarton has added not only to our vertical market expertise, but also to our geographic reach. A combination of organic growth and strategic acquisitions has made AlliedBarton the quality company it is today. With each expansion, AlliedBarton diligently sought out companies that matched our values and philosophy of customer service. Through our combined base of talent and personnel, AlliedBarton brings unmatched resources, expertise and knowledge to our customers' security programs.

Today, with over 55 years of experience in the contract security industry, AlliedBarton's more than 60,000 employees and 120 offices nationwide service a client base of thousands that includes approximately 200 Fortune 500 companies across the country. The most honored security officer services company, AlliedBarton offers on-the-job, web-based, and ongoing training programs for all personnel from security officers through executive-level management. Our commitment to training includes several customized industry-specific programs.

AlliedBarton’s focus on leadership and Human Capital Management moves employee growth and development to the forefront of company initiatives and fosters a culture of quality and continuous customer satisfaction.



Allied Security, Inc. founded in Pittsburgh, Pennsylvania


Barton Protective Services founded in Atlanta, Georgia


SpectaGuard founded in King of Prussia, Pennsylvania


SpectaGuard acquires New York-based Effective Security


SpectaGuard acquires Allied and combines to form Allied Security - the third largest security company in the United States


Allied acquires Professional Security Bureau (PSB)


Allied acquires SSI


Allied further adds to its depth of resources with the acquisition of Barton Protective Services to form AlliedBarton Security Services - creating the largest American-owned contract security services company in the United States


AlliedBarton further enhances the quality of our security offerings to clients with the acquisition of Initial Security

AlliedBarton viewed every acquisition as an opportunity to combine the best practices of each organization. The result is the quality security service and depth of resources we offer our clients today.

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Contact a Security Specialist today to discuss your needs: 866.825.5433 or

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