Dejan Zelic
Senior Penetration Testing Engineer
Phoenix, Arizona, United States
Summary
👤
Senior🎓
Top SchoolDejan Zelic is a Senior Penetration Testing Engineer with 11 years of hands-on experience in offensive security, currently at AWS after leading security research and content development at Offensive Security. He has built and shaped multiple certification courses and exams (including OSWE and OSWP), developed OSCP exam machines, and led large-scale penetration testing programs and assessments in financial services. Dejan combines deep technical testing skills—from web and cloud attacks to macOS control bypasses—with a passion for teaching and mentoring, making complex vulnerabilities accessible to learners. He tinkers with IoT and home automation, competes in CTFs, and brings an operator’s curiosity informed by entrepreneurial roots running small tech businesses. Based in Phoenix, he balances technical rigor with practical creativity—whether woodworking, gardening, or walking his adopted Greyhound, Bellini.
11 years of coding experience
6 years of employment as a software developer
Associate's degree, Business/Commerce, General, 3.89, Associate's degree, Business/Commerce, General, 3.89 at Paradise Valley Community CollegeBachelor's degree, Computer and Information Systems Security/Information Assurance, 4.2 GPA, Bachelor's degree, Computer and Information Systems Security/Information Assurance, 4.2 GPA at Arizona State University, W. P. Carey School of Business
English, Serbian
Stackoverflow
321reputation
20kreached
3answers
8questions
Github Skills (158)
rtsp10
penetration-testing10
realtime10
apple-tv10
audio-player10
webos10
audio10
camera10
methodology10
object-detection10
airplay10
audio-streaming10
passwords10
infosec9
ai9
Programming languages (13)
Github contributions (5)
dejanzelic/coxusage-docker
Jul 2020 - Mar 2022
Get the usage data of Cox
Contributions:3 commits, 1 PR, 7 pushes in 1 year 8 months
usage-data
asu-cis-capstone/dtekt
Jan 2015 - Apr 2015
Contributions:6 releases, 19 commits, 4 PRs in 2 months
python
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