Dion Alexopoulos
@dionalexopoulos
I lead security programmes, GRC maturity, and audit readiness across EMEA organisations.
United KingdomWhat I'm looking for
I lead security strategy and programme maturity for Allwyn Lottery Solutions, owning the full security lifecycle across a multi-country software organisation and advising the CTO and senior leadership. I direct a distributed team of 10+ professionals across governance, architecture, application security and cloud security while maintaining ISO 27001/27018 ISMS and SOC 2 Type 2 assurance.
Through Strativault Security Advisory, I deliver vCISO engagements focused on executive diagnostics, risk and maturity assessments, prioritised roadmaps, policy and control uplift, and decision-ready reporting. Previously, I delivered CISO advisory at Capgemini and led cloud assurance and security work at Hewlett Packard Enterprise across regulated financial services, insurance and pharmaceutical clients.
Experience
Work history, roles, and key accomplishments
Founder & Principal
Strativault Security Advisory LLC
Jan 2026 - Present (7 months)
Established an independent vCISO and security-advisory practice for remote EMEA and international engagements, focused on strategy, governance, risk, compliance and programme maturity. Built an engagement model suited to multi-client delivery: executive diagnostics, risk and maturity assessments, prioritised roadmaps, policy/control uplift and decision-ready reporting.
Director of Information Security
Allwyn Lottery Solutions
Jan 2021 - Present (5 years 7 months)
Own the security lifecycle for a multi-country software organisation, advising the CTO and senior leadership while leading a distributed function of 10+ professionals across governance, architecture, AppSec and cloud security. Develop and execute multi-year security strategy, formal risk assessments and treatment plans; support risk-appetite and acceptance decisions through business-impact analysi
CIO/CISO Advisory, Cybersecurity Consulting
Jan 2017 - Dec 2021 (4 years 11 months)
Delivered multi-client CISO advisory across financial services, insurance and other regulated sectors, shaping security strategy, operating models, governance, IAM, cloud risk and regulatory transformation. Led ISO 27001 ISMS implementations and management-review processes, plus SOC 2, PCI, GDPR and PSD2 readiness, turning regulatory requirements into sustainable controls and evidence models.
Led security assurance for major banking, insurance and pharmaceutical clients across access governance, SDLC, DevSecOps, cloud controls and operational service requirements. Implemented IAM, role-based access, operating-system hardening and CIS-aligned controls, and managed secure development and release-lifecycle activities.
Services Operations Engineer
VELTI S.A.
Jan 2010 - Dec 2011 (1 year 11 months)
Supported secure Java applications, databases and analytics platforms in 24/7 production, performing risk assessments, debugging and operational-stability reporting.
Education
Degrees, certifications, and relevant coursework
Royal Holloway, University of London
Master of Science, Information Security
Grade: Distinction
Completed an MSc in Information Security with Distinction.
University of Athens
Bachelor of Science, Computer Science
Completed a BSc in Computer Science.
Tech stack
Software and tools used professionally
Availability
Location
United KingdomAuthorized to work in
Job categories
Skills
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