Dionach

Dionach is a UK-based cybersecurity firm and one of a small number of CAA ASSURE and CREST accredited providers, delivering cyber audit and risk management, technical security testing, and ICS/OT security for aviation organizations. It supports UK aviation entities in meeting CAP 1753 cybersecurity oversight requirements.

Dionach is an Oxford, UK based cybersecurity consultancy, acquired by the European security and networking group Nomios in October 2024 and now operating within that group. For aviation it delivers CAA ASSURE cyber audits, EASA Part-IS assessments, penetration testing, and OT, ICS and SCADA security testing. Dionach is accredited in all three CAA ASSURE specialisms, cyber audit and risk management, technical cyber security, and ICS/OT, and also holds CREST approval, PCI QSA status and ISO 27001 certification. Its aviation clients are airports, ground service providers, airlines, air navigation service providers and aviation infrastructure operators that fall in scope of the CAP 1753 cyber security oversight process.