Ioannis Kalligeris

Background

About Ioannis Kalligeris

Once a philosophy student deep in metaphysics — now a Cybersecurity Specialist in one of the Greece's largest Insurance Organization and Cybersecurity consultant ex-Deloitter protecting one of Greece’s largest banks, decoding phishing attacks, shaping CISO dashboards, and aligning with frameworks like ISO 27001 and NIST.No bootcamp. No shortcuts. Just a relentless climb from 0 to Big 4. I didn’t pivot into cybersecurity. I built my own bridge.At Ethniki Asfalistiki, I redesigned our security control KPIs from spreadsheets to live dashboards, automated incident response workflows, and co-led purple team simulations — all while hardening IAM and privileged access across on-prem and hybrid cloud environments.At Deloitte, I’m hands-on in architecture reviews, phishing campaign engineering, DLP customization, and threat/risk evaluations. Before that? I was at Novibet redesigning security tooling used company-wide, translating cybersecurity principles into everyday usability. My work is where compliance meets creativity.And before all that? I was at Wolt, not delivering food but leading technical integrations across Greece, Cyprus, and Malta — managing API-based rollouts, real-time troubleshooting, and cross-team automation. Postman was my lightsaber. JSON was my dialect. Current loadout: Python (in training), Security+, ISO 17024, Postman, and soon an MSc in Cybersecurity.🧭 My next evolution? Ethical hacking — because understanding how attackers think makes defenders smarter.If you're into cybersecurity that’s technical, tactical, and unexpectedly philosophical — let’s connect.