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.
10 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 (8)
almalinux10
django9
python8
javascript1
game-development1
nodejs1
gdevelop1
react1
Programming languages (2)
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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