Dan accumulated over 20 years of experience in cyber security, risk management, policy, audit, and compliance in Brussels, Bucharest, and internationally. He led professional teams supporting European Institutions, National Cyber Competent Authorities, and large corporate businesses in defining cyber security strategies and implementing policies, governance, or operational and technical measures.

In November 2021 Dan was appointed as The Director of the brand-new National Cyber Security Directorate, by decision of the Romanian Prime-Minister, following the approval by the Supreme Council of National Defence.

He is also Management Board member of the European Union Agency for Cybersecurity (ENISA); Governing Board member of the European Cybersecurity Industrial, Technology and Research Competence Centre (ECCC) and the Chairman of the EU CEF Telecom Cybersecurity Programme Governance Board.