Gamified Cyber-Security Training

Zero Days Security

About Us

Zero Days Security organise and promote cyber-security challenges, commonly known as capture-the-flag (CTF) events. Our aims are to promote, develop and encourage participation in CTF events in Ireland. Each Year we run a number of our own events including the Irish College's Cyber-Security Challenge, Cyber-Schools, and Irish team selection and training for the European Cyber Security Challenge.

We also run custom in-house events for conferences, corporations, schools and colleges. Our flagship event, the annual Zero Days CTF attracts over 300 competitors for one of the largest on-site CTF events globally.

If you would like to get involved and become a sponsor or you are looking to host your own event then please contact us at

Our CTFs

Zero Days CTF

Our flagship In-person CTF event for college students and industry professionals


Our Cyber-Schools event introduces secondary students to cyber-security.

ECSC Qualifiers

Part of the Irish team selection for the European Cyber Security Challenge


Join us at most of the top Irish security events for your fix of CTF action.

ZeroDays CTF & Cyber Colleges Sponsors 2023

Upcoming Events

ZeroDays CTF

Saturday, April 1st, 2023

Our flagship national cyber-security event aimed at students, university graduates and ICT professionals. With 300+ participants expected, this will one of the largest in-person CTFs globally

Find Out More!

Cyber-Schools Event

Saturday, April 1st, 2023

Our second annual Cyber-Schools event will run in parallel with our main ZeroDays CTF and offer secondary school students the chance to enjoy the unique experience that is a ZeroDays CTF.

Find Out More!

BSides Dublin

Saturday, May 27th, 2023

ZeroDays will once again be offering individuals at the BSides Dublin conference the chance to enjoy the unique experience that is a ZeroDays CTF.

Visit BSides Dublin Website

ECSC Qualifiers

June 2023

Eligible Individuals who perform well during our ZeroDays CTF and Cyber-Schools event will be invited to try out for the Irish team for the European Cyber Security Challenge (ECSC)

Find Out More!

ECSC Finals

24th - 27th October 2023

Those selected for the Irish Team will travel to represent Ireland at the European Cyber Security Challenge in Norway

Visit the ECSC Website

Contact Us

If you would like to talk to us about hosting your own event, or if you are interested in becoming a sponsor for any of our events, then please get in touch and we will happily talk you through what we can offer or how we might be able to help.