Andrei Lenko

Andrei Lenko
Senior Network Architect

Professional experience

Designed, implemented and maintained a secure production environment to support the web applications and cloud services
 Responsible for designing, configuring and troubleshooting web application and database server farms (Apache, MySQL, AD, IIS, Coldfusion DNS, VMware, iSCSI Shell/perl scripting), network management stations (RADIUS, SNMP, CDP, ICMP). Cisco routers, Catalyst switches (VLANs, IP SLA & Route-Maps, wireless access points, site-to-site VPN tunnels and F5 BIG-IP load balancing (iRules scripting, SSL) in multiple office locations and colocation
 Maintain Red Hat Linux, Windows Server, Cisco IOS, ASA & IPS, F5 Big-IP backups, software updates, security patches, certificates and signitures
 Developed project records and management of service contracts
 Monitoring and analysis the network infrastructure with use of the protocol analyzer, traffic generators and debugging
 Participated in the security audit process for supported systems to identify vulnerabilities and recommended additional controls
 System administration and support of Red Hat Enterprise Linux and Windows servers and network management stations.
 Designed, configured and troubleshoot of the networks based on Cisco Catalyst 6509 Sup720 with MSFC3 (10GbE, HSRP, EIGRP) switches, CiscoWorks LMS and Cisco Secure ACS
 Performed most complicated projects related to designing, deploying and troubleshooting of enterprise networks and distributed systems including core backbones, data centers and branches (Cisco routers, Catalyst switches, PIX firewalls, CiscoWorks LMS, HP OpenView, QNX realtime systems and Linux/Unix storages)
 Network analysis and troubleshooting of large sized networks with use of special tools such as an optical power meter and protocol analyzers


Cisco Certified Network Professional (CCNP)
Certifications Cisco Certified Security Professional (CCSP)
Microsoft Certified IT Professional (MCITP)

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