GCSB Trustmark
GCSB-Registered External Auditor (GCSB-EA)
GCSB-Registered External Auditors are independent professionals - not part of GCSB or Converged Security Institute - who review an organisation's evidence against the GCSB CSF Version 2.0 standards before Organisational Trustmark assessment. Auditors are engaged and paid directly by client organisations at their own rates. GCSB registers, verifies and oversees auditors; tier and certification decisions remain with the independent GCSB Assessment Board.
Verified by GCSB
Registration principles
- Independent of GCSB and CSI
- Assessment Board registration
- Public GCSB-EA register
- Conflict-of-interest step-aside
- Annual registration and CPD
- Clients pay auditors directly
Why join the register
A steady source of client work
Every Organisational Trustmark applicant needs an independent evidence review by a GCSB-Registered External Auditor. You agree your fee directly with the organisation; GCSB takes no commission.
The register is your shop window
Applicants choose their auditor from the public GCSB-EA register, with your name, number, country and verification link.
Independent, verifiable standing
A GCSB-EA number shows clients you meet published requirements, declare your interests and follow the GCSB conduct code.
Founding-auditor offer
The £195 application fee is waived for the first 10 approved auditors.
Limited places. All requirements, the interview and the £295 annual registration still apply.
GCSB Trustmark Award - designation GCSB-EA
- Converged Security Institute (CSI) is the professional development and qualification body.
- Global Converged Security Board (GCSB) is the independent standards, credentialing, accreditation and recognition authority.
- GCSB Trustmark Awards are awarded only to individuals who have demonstrated achievement beyond qualification attainment and membership eligibility.
Trustmark Awards are professional distinctions. They are separate from qualifications, memberships and accreditations.
Eligibility
Individuals only. At least 5 years in security, audit, assurance or risk, a CCSO-level or equivalent recognised audit credential, and no role with GCSB or Converged Security Institute.
Verification information
Each registered auditor receives a GCSB-EA-YYYY-NNN number, shown on the public External Auditor register below and verifiable on the GCSB verify page.
Recognition status
Active for 12 months from registration, renewed yearly on payment of the registration fee and evidence of CPD. Registration can be suspended or withdrawn for breach of the Code or the Conflict of Interest Policy.
Renewal requirements
£295 annual registration with CPD evidence and a renewed declaration of interests.
Prerequisites
- At least 5 years of professional experience in security, audit, assurance or risk
- GCSB CCSO credential or higher, or an equivalent recognised audit or security credential (e.g. ISO/IEC 27001 Lead Auditor, CISA, CPP)
- Not an office holder, employee, contractor or instructor of GCSB or Converged Security Institute
- Signed declaration of independence and interests
- CV and evidence of at least three audit or assurance engagements
- Short remote interview with the Assessment Board
- Agreement to the GCSB Code of Professional Conduct and Conflict of Interest Policy, including step-aside for any client trained or advised in the last 36 months
- Annual CPD and renewal of registration
Application process
- 1
Apply in the Trustmark Portal with CV, engagements and independence declaration
- 2
Pay the £195 application fee and upload the receipt
- 3
Assessment Board review of evidence and independence
- 4
Short remote interview
- 5
Registration, GCSB-EA number and public listing
Application fee: £195 · £295 annual registration
GCSB-Registered External Auditor (GCSB-EA) - Trustmark Registry
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