Saim Keleştemur
General Manager at İstanbul Gedik Üniversitesi
Istanbul, Istanbul, Turkey
Summary
👤
Senior🎓
Top SchoolSaim Keleştemur is a cybersecurity and technology executive based in Istanbul with over 20 years of hands-on experience and a decade of formal leadership roles, currently serving as General Manager of Vitriol and an Assistant Professor. He combines operational leadership (CISO, IT Security & Operations Manager) with program and product management experience at organizations like AlmaLinux and Mile2, delivering governance, risk management, and secure operational practices. A practitioner certified across advanced offensive and defensive disciplines (CASP+, OSCP+, PenTest+, CPENT, CPTE, CSWAE, eCDFP, TSE), he blends deep technical credibility with board-level strategy. His background spans Linux systems administration, editorial leadership in tech media, and early-career game programming—an unusual mix that fuels strong communication and cross-disciplinary problem solving. Currently pursuing doctoral work in international business, he brings an academic rigor to applied cybersecurity and teaches the next generation while running commercial security operations.
9 years of coding experience
13 years of employment as a software developer
Bachelor of Engineering - BE Maritime Studies, Bachelor of Engineering - BE Maritime Studies at Istanbul Technical UniversityDoctor's Degree International Business/Trade/Commerce, Doctor's Degree International Business/Trade/Commerce at İstanbul Gedik Üniversitesi
Turkish, English, French, Portuguese
Github Skills (10)
almalinux10
python9
django9
categories1
javascript1
creator1
game-development1
nodejs1
gdevelop1
react1
Programming languages (3)
Github contributions (5)
sakelestemur/almalinux.org
Aug 2022 - Nov 2022
almalinux.org official web site sources.
Contributions:13 pushes in 3 months
almalinuxsourcesweb-site
sakelestemur/wiki
Jun 2022 - Jul 2022
The AlmaLinux project documentation.
Contributions:5 pushes in 10 days
manualalmalinuxproject-documentation
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