F. Tugrul Gurkaynak

• Managing clusters of 27 Universities and 10 firms including: Bogazici University, Isuzu, ITU and TOGG. • Managing Slurm job queue systems, Flexlm licenses and BeeGFS high performance parallel filesystems. • Automating cluster administration tasks with Saltstack, Bash and Python scripting. • Deploying and providing technical support for Nvidia DGX-1 servers and DGX Stations.

• Administered VMware ESXi Cluster, Office365, PaloAlto and MikroTik devices on 20 branch offices. • Prepared and tracked hardware and software inventories using OCS Inventory NG. • Performed vulnerability scanning and hardening tasks for servers and core network using OpenVAS.

• Administered Server infrastructure of a wifi network serving on 800+ client locations • Performed maintenance and security hardening tasks of Linux and Windows servers • Administered Cisco UCS blade servers, FI’s, Fabric SAN MDS’s, IBM StorWize V7000 - v3700; Actifio Backup CDS systems • Administered of VMware VCenter & ESXi clusters • Managed MS AD, MS DNS and ISC BIND DNS Servers and SSL certificates • Performed production and monitoring tasks of CDR data

• Implemented the Disaster Recovery Site of Telenity on AWS • Level 3 support for Linux OS, Windows OS and backup systems • Deployed and managed VAS servers of 8 GSM operators world wide • Automated Linux fine tuning and security hardenings using Ansible • Administered Citrix Xen and VMware virtualization infrastructure

• Managed infrastructure monitoring systems for 20+ client locations • Built and documented infrastructure standards and best practices • Wrote automation scripts for system administrators’ tasks • Designed, implemented and administered CA Spectrum and CA NFA • Gave trainings for civilian and military personnel • Developed Cisco, HP, AlliedTelesis network devices management and configuration scripts in Perl

• Designed, deployed and administered VMware Cluster systems • Performed P2V migrations, managed Linux servers, administered IBM tape libraries, fabric & iSCSI SAN • Modified and adapted Linux Kernel modules for 3rd party hardware for the client Armed Forces - Coast Guard Command • Secured network infrastructure with 802.1x and FreeRADIUS • Full stack development of the “Electronic expenses software” • Designed and implemented migration of the groupware system from “MS Exchange” to “Google Apps for Work”

• Administered more than 600 Linux Terminal Servers of Ministry of Defence on remote locations. • Implemented and administered GLPi helpdesk software • Packaged and maintained more than 8 linux software for Pardus OS • Managed main servers and performed field work tasks at 5 locations for National Security Council's GUVEN 2008 Maneuver.