Dipl.-Ing. Mike Grozak

- Installation/upgrade/support/troubleshooting of more the 900 Linux servers and desktops (900+ harware nodes) - Preparation and adaptation of Scientific Linux CERN for the usage in the complex of particle accelerators. - Led the Ansible integration project for the complex of accelerators - Work with HP Blades and Blade Enclosures - Renewal of the legacy infrastructure; review and re-factoring of the old code of administrative tools; introduction of new techniques

Highload project, based on ipvs, nginx, ree, varnish and other open source technologies: - Linux administration, troubleshooting, security and performance tuning - MogileFS CDN: installation and configuration - Mysql NDB Cluster: installation and configuration - Support of LVS/IPVS load balancing servers - Support of a Nginx+RoR servers (passenger) - Virtualisation: VmWare ESXi 4.1 - Installation of Git RCS (+ gitosis management scripts)

- Linux administration, troubleshooting, security and performance tuning - Design, development and installation of IP-Telephony network, based on Asterisk (ip/E1/analogue calls, POTS trunks, SIP/H.323 trunks with Cisco Communication Manager and Avaya Media Servers) and Yates - Design and installation of thin client network for Call Center and logistic production - Cooperation with Dresden-based team (based in Dresden) of system administrators (in English). etc

- UNIX/Linux administration, troubleshooting, security and performance tuning - Mail server administration (1000+ users) - Administration of the dialup system - Maintaining and development of various internet services: BIND, Web, Proxy, Mail, IRC, etc. - VPN: installation of pptpd+pppd daemon, participation in the billing development process. - Development of “Olympia” system for ACM Programming contest. - Design and development of Tmail system (some sort of VpopMail for Postfix without hacks)

- Linux administration, troubleshooting, security and performance tuning - Installation, configuration and maintenance of various internet services: BIND, Web, Proxy, Mail, etc. - Apache/Nginx+mongrel/passenger - MySQL 4/5 - Subversion maintenance