Denis Cernih Email & Phone Number

Vaughan, On, Ca

Vaughan, On, Ca

Toronto, Canada Area

Toronto, Canada Area

• As the member of Corporate IT and Cloud Operation teams I am involved in Data Center operations – installation,configuration and maintenance of the network segment – Cisco/Juniper/Fortinet/Checkpoint firewalls, Citrix Netscalers, Cisco and SMC switches and systems segment – VMWare ESX 5 clusters build with Cisco UCS and NetApp SANs• Managing Production QA and UAT Server Infrastructure which include more than 250 Windows and Linux VMs• Working closely with Product and Developing teams to troubleshoot and resolve any server and network related issues.• Responsible for managing and configuration of the Corporate ftp sites and Aspera transfer servers • Implemented and supporting Solar Wind Log and Even Manager in Corporate network segment for collecting and analysing logs from the corporate firewalls, routers, switches, the file and ftp servers• Completed a list of Virtual IT infrastructure migrations between Corporate Data Centers• Performed the network migration from F5 LTMs to Citrix Netscalers and from Juniper Netscreens to Fortigates between Cloud Operation Data Centers• Provide 24/7 on-call support for Production and Corporate environments

Toronto,Ontario

• As the member of Ondemand Infrastructure team I was involved in SaaS Data Center operation installation, configuration and maintenance of the network segment – Juniper SSG firewalls and SSL VPN devices, F5 Big-IP load balancers, Cisco switches – and systems – VMWare ESX 4 clusters, NAS, SANs, HP Server Blades• Configuration and administration of over 250 Windows 2003 and 2008 Production servers. • Implemented and supported Global EFT server clusters to comply PCI DSS standards in the file transferring• Performed the data backups and disaster recovery operations using Veritas Backup Exec 2010• Designed and implemented the corporate network based on Windows 2003 AD, Juniper and Cisco devices for corporate offices Parsippany (US ) ,Toronto and Montreal• Implementation, maintenance and administration of corporate VPN solution based on Juniper SSL VPN devices.• Maintenance, troubleshoot and administration of Corporate local area networks (LANs),wide area networks (WANs), mainframe networks, laptops, computer workstations and peripheral equipment.•Administration and maintenance of Corporate Avaya S8300 Voice systems.• Assisted Tier 2 and 3 Application Support teams with administration, configuration and maintenance of QA DB (Oracle 8i/9i/10g and MS SQL 2000/2005/2008) and Java application platforms (IBM WebSphere and Oracle WebLogic) including troubleshooting and resolving a system and application related issues. •Operation of master consoles, monitoring of the performance of computer systems and networks and coordination of access and usage of computer networks•Implementation of data, software and hardware security procedures (including firewalls and antiviruses)•Participated in SAS 70 Type II and other IT audits.•Provided Tier 2 and 3 Support for the end users with a network and system related issues.•Training of management and staff in the use of applications and operating systems.•Provided 24/7 on-call support for Production and Corporate environments

Toronto, Canada Area

• Implemented and administrated Windows 2003 AD;• Configured, administrated and maintained Cisco routers ( 2600 ),switches ( 2950T ) and firewalls ( PIX 515E);• Administration, maintenance and troubleshooting of LAN, WAN, laptops, computer workstations and peripheral equipment;• Installed, configured and administrated Red Hat Linux servers, MS SQL 2000, Oracle 9i and Citrix QA servers;• Administrated MS Exchange 2000 Corporate email server; • Administrated, maintained and monitored a data backup and disaster recovery systems;• Developed an internal QA and system documentation;• Provided training on new company products and IT Help-Desk support for the clients and users;

Toronto, Canada Area

• Maintained all aspects of Microsoft NT & Windows 2000 network and related components;• Responsible for the security of Intranet/Internet web servers, Outlook Web Access servers, Windows 2000 servers, Exchange 2000 server farm, IIS servers, and Citrix servers.• As a DR Administrator responsible for backing up entire corporate information including all Exchange 2000 private and public information stores, Windows 2000 file/print servers, Great Plains/Dynamics server, and SQL/Oracle database servers. • Monitored systems environment to maintain optimal conditions and security;• Responsible for helpdesk technical support;

Chisinau, Moldova

• Implemented and administrated of wide area network (WANs) parts - dedicated lines (ADSL,SDSL,IDSL technology ) ,Radio Ethernet ( 802.11 ) and dial-up segment (Cisco 5200/5300 );• Administrated and maintained Windows NT4.0 and Linux (Red Hat and FreeBSD) servers, including web and mail services.• Responsible for network analys and monitoring;• Designed and implanted of VoIP solution in the company’s network ( Cisco 5300 and Call Manager );• Tier1&2 supports for customers.