Resume

Summary

Skills

Data networking

• design, configuration and maintainance of large-scale IP/MPLS internetworks and backbone, deep understanding of MPLS principles, 4 years MPLS hands-on experience. Set up, configured and maintained a MPLS network with 40 backbone nodes and thousand customer nodes
• cisco IOS, experience with routers and switches up to 7600/6500 series
• strong troubleshooting and network debugging skills
• deep knowledge of network management principles and SNMP network management, getting enterprises ID
• developed own SNMP management system currently used by 3 companies and managing over 2 thousand devices
• routing protocols (BGP, OSPF, ISIS, RIP) in backbone and customer's networks, protocol-to-protocol redistribution, ability to choose the right one to do the required job knowing their advantages and limitations
• definition of network security procedures, deep understanding of security principles and techniques, using of network security tools
• QoS on MPLS backbone and customer edge devices, traffic priorization and differentiation
• QoS monitoring via cisco service assurance agents, SAA data gathering and processing, command-line together with SNMP SAA configuration and maintainance
• in-depth knowledge of ethernet, IP, UDP and TCP protocols
• 802.1q trunking and vlans, vtp domains, ethernet switching, spanning tree protocol, ethernet troubleshooting
• IPSEC based virtual private networks (on cisco devices) including static and dynamic crypto maps
• VoIP (h323, sip) on linux and cisco devices, wide range of voice cards and voice protocols (E&M, FXO/FXS, ISDN)
• network design for customers, analyse of customer needs and applications, equipement definition addressing customer's needs
• zebra BGP routers
• network authentication via radius and tacacs
• network self-configuration of devices via DHCP and BOOTP

Operating systems

• 7 years redhat/fedora linux administration experience with servers for up to 200 users
• linux kernel-level system tuning, special purpose kernel compilation, performance tuning and high availability, kernel-based services
• system security auditing and troubleshooting
• unix/linux systems installation and configuration, mainly RedHat linux with advanced services, software and hardware raid, backup procedures and regular maintainance
• servers consolidation and virtualization using UML Linux, XEN and Vmware virtual infrastructure, Vmware ESX, Vmware Vcenter
• unix/linux systems administration, user configuration, security and support, filesystem security and consistency, version management, resource sharing, remote printing, disaster recovery
• task automation via scheduled jobs
• server clustering using RedHat Cluster suite
• advanced linux routing/traffic shaping/ firewalls
• basic HP-UX administration
• cygwin environment

Security

• secure computing environment design
• two-factor authentication using RSA ACE, Radius and OpenLDAP
• identity management, single sign-on implementation
• security policies and procedures definition
• GnuPG/PGP infrastructure and tools
• SSL and PKI infrastructure on openssl, SSH
• Symantec Enterprise Security Manager

Databases

• experience with Oracle, Postgresql and Mysql
• database design and software engineering
• database system administration, database backup and restore, user management and support, performance tuning, database security
• database applications programming (SQL and Perl, PHP)

Internet

• 6 years experience with RIPE, RIPE-NCC, RIPE database, attended RIPE LIR and routing registry courses, deep understanding of the RIPE database syntax, usage and purpose, object protection techniques
• founded and maintained 3 local internet registries, many autonomous systems, provider aggregatable and provider independent IP space allocations and assignments
• internet connectivity configuration, load-balancing, backup, autonomous systems, advanced techniques for internet bandwidth management
• internet services installation, configuration and maintainance (DNS on bind, WWW on apache, SMTP on sendmail and postfix, POP3, IMAP on courier, LDAP...) on linux platforms, including security of provided services, ability to troubleshoot common and very uncommon problems, high availability services

Programming

• advanced perl, bash, php programming
• sql (postgresql, oracle), transactions, stored procedures
• basic java programming
• sed, awk scripts
• basic C programming (unix system-level C programming)

Other skills

• experience in consultancy
• customer relationship maintainance, vendor management, task management and supplier coordination
• small teams management>
• experienced computer user, deep understanding of hardware and software, data gathering and storage, advanced computer security, antivirus protection, telecommunication security
• other skills needed when running a middle-scale internet service provider
• NetIQ SRC (former Webtrends) reporting tool implementation and scaling
• Juniper SWA (secure web access) SSL VPN solution

Employment history

Current employer

Previous employer:

• Perl, PHP and C programming
• Security tools implementation support

• leading designer of the IT infrastructure supporting the backbone network services,
• responsible for design and implementation of back office IT infrastructure such as data center, servers, storage, backup, identity management, security and two-way authentication, secure computing environment, servers consolidation and virtualization,
• testing of the solutions to be moved to production,
• consultant for product creation and marketing departments,
• consultant for HR dpt.,
• setting up IT processes, policies and procedures,
• staff training,
• IT operations and helpdesk support and troubleshooting,

Soitron, a.s
Bratislava
Slovakia (Slovak Republic)
February 2005 – August 2005
Position: Second line network infrastructure support engineer
Working as a contractor for Hewlett&Packard (HP managed services) in European IT Operations Center (EITOC) in Bratislava

• responsible for day-to-day operations of NetIQ SRC security reporting application including capacity planning, scalable design and final reports generation,
• development of support tools using SQL, Perl, PHP,
• second line infrastructure support,
• second line Juniper Secure Web Access support,
• development of time and responsibility tracking application,
• some HPUX administration,

SWAN, a.s. Bratislava
Slovakia (Slovak Republic)
January 2001 – January 2005
Position: Senior data network engineer

• responsible for planning, configuration and troubleshooting of IP/MPLS network running on Cisco devices (7600, 6500, 7200, 3600, 2600, 1700, 800 series routers, 2900 and 3500 series switches),
• 4 years of IP addresses assignment and hostmastering (local internet registry),
• 2 years of own network management system developement and implementation,
• 4 years unix systems administration (linux),
• 4 years of internet services configuration and administration (smtp, pop3, imap, http, ftp, dns),
• pre-sales and post-sales custommer support,
• extensive helpdesk support
• 2nd and 3rd line support
• network troubleshooting under various circumstances
• network security procedures definition and implementation
• plenty of experience with internet and all the fundamental procedures for running a local internet registry - RIPE IP space requests, RIPE database and routing registry,
• DNS and reverse DNS,
• multihomed autonomous systems (including BGP configurations) and many more,
• design of virtual private networks for customers (banks, large companies with several branch offices, the office of the government of the Slovak Republic and many more),
• testing of new equipement
• backbone capacity planning
• responsible for IP address plans, layer 3 equipement configuration and so on,
• plenty of experience with fixed wireless access, freeband radio networks, SDH/PDH and frame-relay

EuroTel Bratislava, a.s., Slovakia (now T-Mobile)
1997-2000
Position: Internet services specialist

• responsible for planning, implementation and maintainance of internet services provided by GSM operator,
• 2nd and 3rd line support,
• running of the Local Internet Registry, working with RIPE,
• configuration of L3 devices,
• designing of customer's frame-relay based virtual private networks,
• 3 years of installation and administration of unix systems
• 3 years experience with providing of essencial internet services,
• management systems implementation and integration

Education

University of Economics, Bratislava, Slovakia

Secondary grammar school Tomasikova, Bratislava, Slovakia

Languages

• Slovak (native)
• Czech (fluent)
• English (fluent)
• German (advanced)

Interests