Building Cyber Defenders

Empowering the Next Generation of Cybersecurity Professionals

Legion Offensive Security delivers hands-on cybersecurity training, Capture The Flag competitions, and community-driven events to build real-world skills that matter.

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4+
Workshops Conducted
6+
CTF Competitions
200+
Participants
5+
Partner Organizations
Who We Are

Building Sri Lanka's Cybersecurity Community

Legion Offensive Security is a cybersecurity community focused on hands-on learning and skill development. Through our Security Sundays workshop series, CTF competitions, and collaborative events, we create an environment where aspiring security professionals can grow.

We believe in learning by doing. Every workshop, every CTF challenge, and every event is designed to give you practical experience that translates directly to real-world cybersecurity scenarios.

Hands-on Training
CTF Competitions
Community Events
Industry Connections
$ legion --init
[+] Loading Security Sundays modules...
[+] Network Security — Complete
[+] Web App Security — Complete
[+] Ethical Hacking — Complete
[+] Digital Forensics — Complete
[*] 6 CTFs organized — 200+ participants
[+] Community active — Growing
$ _
What We Offer

Train. Compete. Grow.

From beginner workshops to advanced CTF competitions, we have something for every cybersecurity enthusiast.

Security Sundays

Our flagship workshop series covering network security, web application security, ethical hacking, and digital forensics with hands-on labs.

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CTF Competitions

We organize and participate in Capture The Flag competitions ranging from intra-university to international level events.

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Community Events

Physical and online events that bring together cybersecurity enthusiasts, professionals, and students from across the region.

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Recent Highlights

What We've Been Up To

A glimpse of our recent CTF competitions and community events.

Sleigh the Flag CTF Competition
Inter-University

Sleigh the Flag

8-hour physical CTF with 25 teams competing at NSBM.

25 Teams Physical
ACUSyS International CTF
International

ACUSyS

48-hour online inter-university CTF with 80+ teams from Australia.

80+ Teams Online
CyberSprint 2 CTF
Intra-University

CyberSprint 2

8-hour physical CTF with 20+ teams at NSBM.

20+ Teams Physical
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Gallery

Moments That Matter

Capturing the energy of our community.

Legion Offensive Security event moment

Community in Action

CTF competition participants

CTF Battles

Workshop session

Hands-on Learning

Team collaboration

Team Spirit

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Organized Events With
NSBM Green University Devi Balika College Deakin University Australia Informatics Institute of Technology (IIT) NSBM Green University Devi Balika College Deakin University Australia Informatics Institute of Technology (IIT)

Ready to Level Up Your Security Skills?

Join our community and get access to workshops, CTFs, and exclusive events.

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Certificate Verification Portal

We are migrating to a new certificate verification system. Verify your new certificates and achievements at verify.legionoffensivesecurity.com. Your previous badges from our workshops are still accessible through the Badges section.