- Hands-on systems and network administration in high availability environment- Implementation and management of Firewalls, IDS/USM/SIEM appliances, VPNs, log indexing systems, monitoring systems- Network analysis and troubleshooting

- Continuous support and hands-on management of corporate IT infrastructure including wired and wireless networks, Linux and Windows servers, firewalls, VPNs, virtualization platforms (VMware, Xen, Hyper-V) and cloud-based services- Provide colleagues with assistance in troubleshooting network and software related issues- Participate in pre-sale projects delivering PoC and test environments, local and cloud-based staging environments.

Leading a team of 8 systems/network administrators and support engineers, that provides 365/24/7 support services for a distributed corporate network.Performing hands-on network and servers administration tasks.Managing performance and security for the corporate networks and services.Planning server and network upgrades, managing annual budget for labor, equipment and service procurement.

Installation, setting-up and maintenance of infrastructure servers based on FreeBSD (mail, proxy, database, firewalls, VPN-gateways, etc.) and Cisco network hardware. Analysis of available servers resources and estimation of possible future load increase. Technical solution design for reliable and secure connection new branch offices to corporate network, setting up VPN gateways based on FreeBSD, Cisco and D-link routers. Implementation and enhancement of corporate telephone network, installation and setting up of Cisco VoIP routers.

Ensured corporate LAN security, including network services and threats assessment, design, implementation and maintaining of information security policies and systems. Installation, setting-up and maintaining firewalls (Aker Security Suite, IPFirewall, IPFilter), intrusion detection system (Snort) and antivirus software (DrWeb, Clamav). Participated in a project for corporate LAN upgrade with more than 1000 workstations distributed over 3 branch offices. Network services design and deployment. Installation and setting up of active network devices (Cisco, AVAYA, Cronyx) and FreeBSD-based servers (mail, proxy, dns, file and web servers).