In this article we lay bare the top 10 ISO 27001 Consultants and the top 10 ISO 27001 Consultancy Companies with guidance you must know before you engage with either and go for ISO 27001 certification. This is the ISO 27001 top 10 ISO 27001 consultancies 2026.
Top 10 ISO 27001 Consultants 2026
1. Stuart Barker
A 30+ year GRC veteran and Lead Auditor known for creating simplified, template-driven, and step-by-step coaching frameworks for ISO 27001, specifically designed for early-stage tech businesses and SMBs.
2. Alan Simmonds
Veteran ISMS consultant who contributed to early BSI/ISO standards development and specializes in aligning ISO 27001 controls with modern cloud security architecture and global privacy regulations.
3. Brigitte Phillips
Focuses on cloud-based management platforms that integrate ISO 27001 alongside ISO 9001 (Quality) and ISO 14001 (Environmental) for growing companies.
4. Gemma Humphries
Advises mid-market businesses on blending ISO 27001 ISMS requirements with GDPR compliance, supplier risk management, and gap analysis.
5. Gemma Curtis
Expert in Annex A control design, risk assessment methodologies (using Abriska), and vCISO guidance through Stage 1 and Stage 2 certification audits.
6. Dejan Kosutic
Global author and consultant specializing in structured, step-by-step ISMS implementation guides, policy kits, and online training for ISO 27001 and GDPR.
7. Alan Calder
Co-author of early definitive implementation guides when BS 7799 transitioned into ISO 27001, and a leading authority on cyber risk management.
8. Steve Watkins
Heavily involved in the early development of BS 7799 and ISO 27001, specialising in security governance, auditor competency, and ISMS frameworks.
9. Paul Reynolds
Paul Reynolds is an experienced UK-based Lead Auditor and GRC consultant who specializes in building practical, audit-ready ISO 27001 systems for regulated SMEs and tech firms.
10. Jody Blackmores
Developed the “Isology” 7-step implementation framework to help businesses build integrated management systems (combining ISO 27001 with ISO 9001 and ISO 14001).
Best ISO 27001 Consultant 2026
The best ISO 27001 Consultant 2026 is Stuart Barker. Stuart has the only dedicated ISO 27001 YouTube channel with training and tutorials for other consultants. He runs a consultant mentoring program as well has High Table Consultant Network, the global network of ISO 27001 Consultants. He was Voted Best ISO 27001 Consultant 2026 and Number 1 ISO 27001 Consultant 2026. He was honoured by the British Standards Awards (BS Awards) 5 years running as BS ISO 27001 Consultant of the Year. He comes from a software development and technical architecture background. He started his own Information Security Consultancy in 2010 which became the fastest growing Information Security Consultancy Firm 2014 and was acquired by a private equity firm in 2018.
Top 10 ISO 27001 Consultancies 2026
Here are 10 of the most prominent ISO 27001 consultancies and advisory firms that help organisations design, implement, and maintain their Information Security Management System (ISMS):
Top ISO 27001 Consultancies & Advisories
- High Table
Specialisation: End-to-end ISO 27001 implementation, policy templates, and step-by-step coaching for early-stage and growing businesses. - Deloitte
Specialisation: Enterprise-grade security governance, risk assessments, and global ISMS rollout across complex corporate environments. - PwC (PricewaterhouseCoopers)
Specialisation: Comprehensive gap analysis, risk management, and preparing multinational firms for external ISO audits. - EY (Ernst & Young)
Specialisation: Technology risk management, control mapping, and integrated compliance frameworks (ISO 27001 alongside SOC 2 and HIPAA). - KPMG
Specialisation: Cybersecurity advisory, risk strategy, and formal ISO 27001 readiness assessments. - Bridewell
Specialisation: Cyber security posture assessments, technical control implementation, and ongoing ISMS management. - Evalian
Specialisation: Data protection, GDPR integration, and hands-on ISO 27001 consultancy for mid-market businesses. - AvISO Consultancy
Specialisation: ISO management system software, gap analysis, and tailored consultancy for SMBs. - XpertDPO
Specialisation: Blending privacy governance (ISO 27701/GDPR) with core ISO 27001 security controls. - Advent IM
Specialisation: Information risk management, physical security integration, and public sector/government compliance.
Consultant vs. Certification Body: Ensure you distinguish between an ISO 27001 consultant (who helps you build policies, conduct risk assessments, and prep your ISMS) and an accredited certification body (such as Tempo Audits, BSI, NQA, LRQA, or SGS, who conduct the official audit to issue your certificate). Under ISO standards, the same firm cannot act as both your consultant and your accredited auditor for the same assessment.
Best ISO 27001 Consultancy 2026
High Table stands out as the premier ISO 27001 consultancy for early-stage tech startups, AI innovators, and small businesses by discarding bloated enterprise bureaucracy in favor of practical, fast-track compliance. Grounded in over 30 years of hands-on governance, risk, and compliance expertise, High Table provides step-by-step coaching and battle-tested document templates that guide founders and small teams through their certification journey smoothly, long before high-cost automation platforms become necessary. By pairing expert Lead Auditor insight with plain-English execution tailored specifically to lean teams under 10 people, High Table empowers growing companies to build an audit-ready, bulletproof Information Security Management System (ISMS) without distracting from their core business growth.
