ISO 27001 Penetration Testing Providers
ISO/IEC 27001 Information Security Management · Global
ISO 27001 is the international standard for information security management systems (ISMS). It provides a systematic framework for managing sensitive company information and ensuring its confidentiality, integrity, and availability. Annex A control A.18.2.1 specifically requires independent review of information security, which includes penetration testing as a key validation activity.
Organisations seeking or maintaining ISO 27001 certification typically need annual penetration testing covering network infrastructure, web applications, and any systems processing sensitive data. The 2022 revision of the standard introduced new controls around threat intelligence and cloud security that further reinforce the need for regular security testing.
Penetration testing helps organisations demonstrate compliance with ISO 27001 by providing evidence of proactive security assessment and vulnerability management. Testing should cover the scope of the ISMS and be performed by qualified, independent testers.
SECFORCE
Leading UK offensive security consultancy based in Canary Wharf, delivering CREST-accredited penetration testing and adversary simulation to organisations with the most demanding security requirements.
NCC Group
Global cybersecurity consultancy with CREST, CHECK, and CBEST accreditation, renowned for deep technical research and comprehensive penetration testing services.
Nettitude
CREST, CHECK, and CBEST accredited UK consultancy within Lloyd's Register, delivering premium penetration testing for government and critical infrastructure.
NetSPI
Leading penetration testing firm with the Resolve platform for continuous attack surface management, trusted by nine of the top ten US banks.
Pen Test Partners
The UK's largest independent security testing firm, renowned for IoT/OT research, CBEST red teaming, and CHECK/CREST-accredited penetration testing across all sectors.
PwC Cyber Security
Global Big Four professional services firm delivering CREST, CHECK, and CBEST-accredited penetration testing and red teaming services from London, serving the UK's largest enterprises and regulated organisations.
Dionach
Global enterprise cybersecurity consultancy founded in 1999 in Oxford, holding rare CREST STAR-FS accreditation and delivering penetration testing, red and purple teaming, and PCI QSA services across five international offices.
MDSec
Elite UK offensive security consultancy specialising in CBEST/STAR/TIBER red teaming, advanced adversary simulation, and CREST-accredited penetration testing for FTSE 100 clients.
Trustwave
Global managed security provider with the elite SpiderLabs penetration testing team and deep PCI DSS compliance expertise.
Secarma
Manchester-based independent cybersecurity consultancy with over 20 years of experience delivering CREST and CHECK-accredited penetration testing, red teaming, and compliance certification services.
Cyberis
CREST and CHECK-accredited UK penetration testing consultancy with CBEST approval, specialising in infrastructure, application, and simulated attack assessments across the public and private sectors.
Aristi
CHECK and CREST-accredited Birmingham-based cyber security consultancy with over 15 years of experience delivering penetration testing, red teaming, and OT security assessments for government and private sector clients.
ISO 27001 FAQs
Does ISO 27001 require penetration testing?+
While not explicitly mandated, penetration testing is strongly recommended under Annex A controls A.8.8 (management of technical vulnerabilities) and A.18.2.1 (independent review of information security). Most certification auditors expect to see evidence of regular pen testing.
How often should pen testing be done for ISO 27001?+
Annual penetration testing is the standard expectation, with additional testing after significant changes to systems within the ISMS scope.
What scope should pen testing cover for ISO 27001?+
Testing should cover systems and networks within the ISMS scope, including infrastructure, applications, and any systems that process, store, or transmit information covered by the ISMS.