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.
Featured in: Best CREST Pen Testing Companies
Key facts
- Founded in 1999.
- Headquartered in Oxford, United Kingdom.
- Team of 51-200 security professionals.
- Holds CREST, CHECK, STAR, ISO 27001, PCI QSA, and NCSC Assured accreditation.
- Delivers 11 penetration testing services.
- Operates globally, with delivery across the UK, Europe, North America, and APAC.
- Specialises in Adversary Simulation, OT/ICS Security, and Payment Security.
- Compliance expertise across PCI DSS, ISO 27001, GDPR, NIS 2, and DORA.
About
Dionach is an enterprise-focused cybersecurity consultancy founded in 1999 and headquartered in Oxford, United Kingdom, with over 25 years of experience delivering expert security services around the world. The firm employs over 50 cybersecurity professionals across offices in Oxford, Manchester, Glasgow, New York, and Tokyo. Dionach was acquired by Nomios Group in 2024. The company holds CREST, CHECK, CREST STAR-FS, ISO 27001, ISO 9001, and PCI QSA accreditations.
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