Ali Omar Mustafa

Ethical Hacker | Cybersecurity Engineer at Defa3

Dubai, United Arab Emirates

About

Cybersecurity Engineer at Defa3 Cyber Risk Management Services, specializing in offensive security, pre-sales, and the full lifecycle deployment of enterprise security solutions, from cloud and on-premise implementation to ongoing maintenance. I've led and delivered cybersecurity projects for some of the UAE's most recognized organizations, including Emirates Airlines, ADIB, ADCB, Dubai Holding, MOEI, DCAS, HCT, MBC, AHA, RSP etc. Certified Technical Engineer across 11 enterprise platforms: Tripwire · Invicti · Picus · Delinea · Trend Micro · Checkmarx · Appknox · Qualys · Halcyon · Nozomi · Traceable. On the offensive side, I'm an active CTF competitor and ethical hacker, with these highlights: 🥇 1st Place — Dubai Police CTF 2024 (13 solves, 1 first blood) 🏅 4th Place — {:cyber} Hack Arena CTF @ Intersec 2024 (38 solves, 2 first bloods) 🎯 5th Place — ISNR CTF 2024 🏆 7th Place — GITEX Global CTF 2024 (34 solves, 3 first bloods) 🌍 Top 20% Globally on CTFTime | 2nd in UAE (team 4O1) 2024 Beyond the technical work, I co-founded Exploit3rs — a cybersecurity education platform where I head the Cyber Range & Education division, designing training programs and hands-on learning environments for the next generation of security professionals. Currently pursuing CPTS (HTB) and OSCP — adding to an already deep certification stack spanning ISC2, IBM, NYU, Google, AWS, and CISCO. Let's connect.

Experience

  • Cyber Security Engineer at Defa3 Cyber Security
    Sep 2024 - Present · 1 yr 11 mos

    Cybersecurity Engineer at Defa3 Cyber Risk Management Services, responsible for the full lifecycle of enterprise security product delivery, from pre-sales to deployment and ongoing maintenance, across major UAE organizations. Responsibilities: • Lead pre-sales engagements with clients, delivering technical presentations and scoping security solutions tailored to their environments • Manage end-to-end implementation and deployment of security products in both Cloud and On-Premise environments • Provide ongoing maintenance and support services to ensure product performance and client satisfaction • Serve as the technical point of contact across multiple concurrent enterprise accounts Notable projects delivered for: Emirates Airlines · ADIB · ADCB · Dubai Holding · MOEI · DCAS · HCT · MBC · AHA · RSP Certified Technical Engineer across alot of Defa3 product portfolio: Tripwire · Invicti · Picus · Delinea · Trend Micro · Checkmarx · Appknox · Qualys · Halcyon · Nozomi · Traceable

  • Ethical Hacker at Self-employed
    Apr 2022 - Present · 4 yrs 4 mos

    Active competitive ethical hacker and core member of the official university hacking team 4O1, competing in CTF (Capture the Flag) events at local, national, and international levels. CTF achievements: 🥇 1st Place — Dubai Police CTF 2024 (13 solves, 1 first blood) 🏅 4th Place — {:cyber} Hack Arena CTF @ Intersec 2024 (38 solves, 2 first bloods) 🎯 5th Place — ISNR CTF 2024 (5 solves) 🏆 7th Place — GITEX Global CTF 2024 (34 solves, 3 first bloods) 🌍 Top 20% Globally on CTFTime | 2nd in UAE (team 4O1) Specializations: web exploitation, reverse engineering, digital forensics, OSINT, binary exploitation, and AI-integrated security challenges. Continuously developing offensive security skills through competitive hacking, platform-based training, and original CTF challenge development.

  • Co-Founder & CTO & Head of Cyber Range & Education at Exploit3rs
    Jan 2024 - May 2026 · 2 yrs 5 mos

    Co-founded Exploit3rs — a cybersecurity platform dedicated to hands-on security education through cyber ranges and structured training programs. As Head of Cyber Range & Education, I oversee the technical strategy and end-to-end development of the cyber range platform, and lead all cybersecurity training and education initiatives. • Design and manage cyber range environments that simulate real-world attack and defense scenarios • Develop and deliver structured cybersecurity training programs for students and early-career professionals & keep professionals up to date with the current threats • Oversee the technical architecture and growth of the educational platform • Build a community of cybersecurity learners and practitioners across the UAE • Create original CTF challenges and oversee the quiality of the challenges

  • Quality Assurance Engineer at Mate
    Mar 2024 - Dec 2024 · 10 mos

    Worked as a QA Engineer at Mate, focused on the quality, reliability, and security of the platform's mobile app and website. • Enhanced user experience through systematic testing and iterative feedback to the development team • Conducted risk assessments to identify failure points and potential security vulnerabilities • Performed thorough functional testing and code reviews across both mobile and web platforms • Applied a security-aware mindset to QA — drawing on a cybersecurity background to surface issues beyond standard functional bugs • Contributed to test planning and quality process documentation

  • Curtin University Dubai (3 yrs 2 mos)
    • Cyber Security Specialist
      May 2023 - Feb 2024 · 10 mos

    • Arabic Teacher
      Jan 2022 - Nov 2023 · 1 yr 11 mos

      I’m a tutor in the Arabic club, teaching the members how to speak Arabic, communicate properly with Arabs, and teach them about the culture and traditions of Arabs.

    • Assistant Lecturer
      Jan 2023 - Sep 2023 · 9 mos