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GSA Global is a security company with an office in Colchester, providing close protection and event security to clients across the whole of the UK. Its close protection officers (CPOs) include personnel drawn from the Royalty and Specialist Protection (RaSP) command at Scotland Yard. The company is led by former senior police and government security leaders. Its event security services are aligned with Martyn's Law.

GSA Global works with clients in a range of sectors, including government and public administration, financial services, technology and telecoms, critical national infrastructure, travel and hospitality, and family offices. The company holds ISO 27001 certification, the international standard for information security management, under certificate number 22117, and its staff are SIA-licensed.