July 2010 – now
Ricoh Europe B.V., Netherlands
Senior Network Engineer
Responsibilities:
- Cisco equipment (routers, switches, firewalls)
- Juniper equipment (firewalls)
- CheckPoint firewalls (R60, R61, R65)
- BlueCoat proxy servers (SG 8100)
- Linux/Unix/Solaris servers (FreeBSD, CentOS, Debian, Red Hat)
- Monitoring systems like nagios, centreon, nagvis, cacti
April 2010 – June 2010
MartinAir, Netherlands
IT Consultant
Responsibilities:
- User services and application migration from old network to new
- Windows 200x Servers (Active Directory, Print Servers, Network Shares, Network Printers etc)
- Citrix MetaFrame, XenApp, WebClient, PNA
- Large TDM network migration to VoIP/TDM (Cisco, NEC)
- Lotus Notes 6.x, 8.x
- Windows XP workstation migration (from old network/AD domain to new one)
December 2009 – now
VLF Networks B.V., Netherlands
IT Consultant
Responsibilities:
- Managing, configuration cisco equipments (Cisco Switches, Routers, Firewalls, Load-Balancers etc)
- Linux/FreeBSD servers (iptables, ipfw, Asterisk, MySQL, proftpd, postfix, apache)
- Windows 2008 Servers (Active Directory, Exchange 2007)
- Citrix MetaFrame, Citrix XenApp, Citrix WebIntercace, Citrix PNA
- Large VoIP/TDM networks
- Migration of Citrix, Network, VoIP infrastructure from one buildings to other (staff relocation)
- Implementation of DMVPN on large client network (DMVPM + IPSec (shared key, MS certificate server, cisco router as certificate server/SCEP) (routing protocols – OSPF, EIGRP)
- VoIP application development (TCL for Cisco Voice gateways)
- Voice gateways configuration for PortaOne billing engine
- BATA ([login to view URL]) network modernization. Network re-design (change equipment, DMZ, LAN, WAN, DataCenter solutions), Remote update of the equipment, reconfiguration of current (re-used) equipment)
- BATA CallCenter installation and configuration based on the Cisco Callmanager and another Cisco equipment and software
- Linux servers maintaince tasks (nagios, centreon, cacti, ftp, apache, dns, mail)
- Web backend for PowerDNS server (mysql + php + html)
- VoIP network support based on the Asterisk and Grandstream phones
- Support of Lotus Notes Server
- Microsoft Exchange, Active Directory maintenance tasks
- PHP/Perl development for system purposes
- Cisco UC500 series configuration for customers
May 2008 – December 2009
"UkrSibbank BNP Paribas group" Commerce Bank, Head Office, Kyiv, Ukraine
Deputy head of Corporate Network team.
Responsibilities:
- Designed, implemented and managed corporate network WAN&LAN
- Managed CWDM topology.
- Managed DMZ: firewall management, networking.
- CheckPoint administration (Nokia IP appliances (69x, 29x), SmartCenter, SmartConsole etc)
- Linux administration(OS: Gentoo, Debian, Red Hat. Applications: iptables, apf, ddos, bfd, apache, asterisk, mysql, nagios, cacti, mrtg, php, rrdtools, proftpd, postix, dovecot, mailman, curys-sasl, shell scripting (bash, perl, php), bacula, openvpn, bind, mydns, zebra. Tasks: installation, configuration, support of the systems and applications, linux kernel optimization, linux OS optimization tasks).
- Managed Linux based DMZ of the bank (internal & external firewalls based on the Gentoo Linux and iptables+apf+bfd+ddos)
- Managed Linux based firewalls for extranet connection (between bank and client(customers))
- Managed MPLS backbone (TE, VRF, EDGE routers, RSVP, MP-BGP etc)
- Managed more then 400 servers on the Linux OS (Debian, Red Hat) for services like iBank (internet banking), corporative web site, corporative mail system (based on the postfix+mysql+cyrus-sasl)
- Managed Cisco & Linux routers, all WAN area, more then 1000 sites placed in all Ukrainian territory(around 3000 Cisco devices)
- CiscoCallManager installation (cluster, standalone etc), configuration and support.
- Design, installation, configuration, support of VoIP network of the bank
- Managed Head offices LAN area includes datacenters, 5 sites around 200 Cisco devices.
- Managed interior and exterior network routing using EIGRP, BGP
- Securing data with IPSEC
- Support and securing mail system
- Managed customer internet access system
- Managed Cisco secure ACS server
- Installed, secured and managed BIND, Apache, Postfix, MySQL, Squid, TACACS+, Jabberd, Bacula, Nagios, MRTG, NetFlows.
- Supporting Nortell NetID DHCP and DNS service.
- Basic IBM AIX administration.
- Managing process of BNPP network integration.
- PHP, Perl, shell scripting for some tasks.
- Proxy infrastructure migration to BNPP standards (squid to BlueCoat with FinJan, design, installation, configuration etc)
- VoIP projects for NOC Unit (Asterisk – SIP server, Cisco IP Phones (7911G & 79xx), Cisco 2821 as voice gateway)
- Managed Nortel network equipment (switches and load-balancers (L2/L7 switches, 25xx, 35xx, 45xx))
May 2007 – May 2008
"UkrSibbank BNP Paribas group" Commerce Bank, Head Office, Kyiv, Ukraine
Senior network administrator.
Responsibilities:
- Designed, implemented and managed corporate network WAN&LAN
- Managed DMZ: firewall management, networking.
- Linux administration(OS: Gentoo, Debian, Red Hat. Applications: iptables, apf, ddos, bfd, apache, asterisk, mysql, nagios, cacti, mrtg, php, rrdtools, proftpd, postix, dovecot, mailman, curys-sasl, shell scripting (bash, perl, php), bacula, openvpn, bind, mydns, zebra. Tasks: installation, configuration, support of the systems and applications, linux kernel optimization, linux OS optimization tasks).
- Managed Linux based DMZ of the bank (internal & external firewalls based on the Gentoo Linux and iptables+apf+bfd+ddos)
- Managed Linux based firewalls for extranet connection (between bank and client(customers))
- Managed Cisco & Linux routers, all WAN area, more then 1000 sites placed in all Ukrainian territory (around 1300 Cisco devices)
- Managed Head offices LAN area includes datacenters, 5 sites around 200 Cisco devices.
- Managed interior and exterior network routing using EIGRP, BGP
- Securing data with IPSEC
- Managed MPLS backbone (TE, VRF, EDGE routers, RSVP, MP-BGP etc)
- CiscoCallManager installation (cluster, standalone etc), configuration and support.
- Design, installation, configuration, support of VoIP network of the bank
- Support and securing mail system
- Managed customer internet access system
- Managed Cisco secure ACS server
- Installed, secured and managed BIND, Apache, Postfix, MySQL, Squid, TACACS+, Jabberd, Bacula, Nagios.
- VoIP projects for NOC Unit (Asterisk – SIP server, Cisco IP Phones (7911G & 79xx), Cisco 2821 as voice gateway)
- Managed Nortel network equipment (switches and load-balancers (L2/L7 switches, 25xx, 35xx, 45xx))
May 2006 – May 2007
"PortaOne Inc."
Senior support enginier.
Responsibilities:
- Customer support via phone/email
- Customer servers support (FreeBSD, MySQL, Perl, PHP, dovecot, exim, asterisk, PortaOne own script and applications, MySQL Cluster, Bind, Apache, tftpd, SNMP, FTP)
- HotFix for customer servers (perl, php, shell scripting).
- Patches for PortaOne solutions, custom patches etc (perl, php, shell scripting).
- Action with replication on MySQL servers.
- Voice GW configuration (AS55xx)
- IP Phones configuration (Cisco, ATA, Linksys etc)
- OpenSource software configuration (for VoIP systems): Asterisk, SER, OpenSER, SIPPY.
- Small TCL scripting
September 2005 – May 2006
"FreeNET ISP"
NOC enginier.
Responsibilities:
- Customer support via phone/email
- Network equipment support (Cisco, FreeBSD, Linux, Nortel Passport (Frame-Relay))
- Application level support (postfix, proftpd, curys-sasl, apache, php, mysql, iptables etc)
September 2002 – September 2005
ICC (Informational Calculation Centre of Kyiv National University of T. Shevchenko)
NOC engineer.
Responsibilities:
- Support Cisco switches, routers of University campus network
- Configuration and managing of FreeBSD/Linux servers (routing, nat, proxy server, ftp server, jabber)
- Cisco Network Academy (CCNA, CCNP courses, passed CCNA)
- tac_plus, radius modules development(single logon for network equipment and for FreeBSD/Linux shell)
- php development job (all kind of scripts (web applications, system tasks etc))
- Java development (change own application AuthProxy from standalone codo to cross-platform solution (Java)
