Regulated by ODPA
Six providers span the island's cybersecurity market — four limited companies, plus the States-backed Guernsey Cyber Security Centre delivered under contract by JCSC. The oldest, Logicalis (1982), opened the Channel Islands' first Security Operations Centre in 2017; the newest, GCSC, launched in 2026. Three are Vale-based. —
To auto-generate a shortlist, pick from the options below (or tick businesses from the directory to build your shortlist manually).
Vale·Professional services·Est. 2010
✦Guernsey's only digital forensics specialist
Professional firm founded in 2010 by Carl Ceillam, specialising in information security assurance, advisory, and digital forensics services across the Channel Islands.
St Martin
Part of Logicalis UK&I
Global technology service provider delivering next-generation digital managed services, an ISO certified organisation and a Cisco Preferred Partner.
Vale·Professional services·Est. 2004
Part of Sigma Group
Network specialist firm offering network design, planning, supply, and implementation, with advanced cyber security capabilities.
Vale·Est. 1990
Managed IT support and cybersecurity company with staff holding CCDA/CCNA networking qualifications and over 13 years of military-grade IT security knowledge, based in Vale.
St Peter Port
Independent Cyber and Information Security specialists, offering penetration testing and Virtual Chief Information Security Officer (vCISO) advisory support.
St Peter Port
Service funded by the Government of Guernsey that offers cyber security guidance and monitors public networks.