Yi Liu Email & Phone Number

Toronto, Canada Area

 Managed 200+ servers consist of Ubuntu, Redhat, Centos Linux and Windows servers- Created and maintained VMs and templates in VMware and Hyper-V environment- Routinely applied security patches and system updates, to pass vulnerability check and audit- Authored and maintained Puppet scripts to manage configuration by server roles- Built and maintained local repository (Aptly server) for system configuration baselining- Troubleshoot problems and implement changes to fix problems, and ensure compliance with Incident and Change management processes Develop tools to automate operation tasks (Bash, Python, Flask, MySQL, Bootstrap)- Developed multiple internal used applications to check email routing, inspect email queues and control spams- Developed web-based email test tool to quickly test smtp servers with different features including forced TLS, authentication, MIME format, etc.- Developed web-based tool to check certificate status and send alerts for expiry and errors Managed email firewall systems and applications- Routinely check and ensure inbound and outbound emails flow without spams and congestion- Reroute email flow to assure business continuity when primary route is broken- Act as focal point to work with vendor support to solve problems or request new functionalities Provided L3 support - Acted as escalation point in a global team to solve complex issues- Acted as a coach for L1/L2 team by writing SOPs and knowledge sharing sessions- Represent the company to work with other venders to solve customer problem Participated and led special projects - Built a lab environment for operations team to run tests- Upgraded CommVault backup solution from v9 to v11 on more than 100 servers

Toronto, Canada Area

 Provided professional services to small business clients on designing and building of IT infrastructure- Implemented virtualization solution using VMware ESXi and vSphere Client- Integrated all technology components including virtual server, CentOS, MySQL, Apache, and web applications - Implemented LDAP directory service using FreeIPA - Configured Samba servers for internal file sharing - Built FTP server for data exchange with clients’ partners - Implemented email server (SMTP/POP3) using Postfix and Dovecot - Designed and implement backup strategy- Built AWS could-based prototype to assess web application migration- Authored Bash/Python scripts to monitor server and network performance and automate administration tasks- Designed and implemented LAN/WAN network infrastructure- Implemented DNS with unbound- Implemented DHCP server- Setup VPN using OpenVPN- Enhanced network security with firewall rules on hosts and network router

 Managed projects to implement new IT systems, including cloud based CRM system, network performance monitoring system, SLA monitoring and notification system Managed projects to streamline working processes and improve efficiency. Projects included improving call center agents remote fix rate, reducing parts consumption, reducing engineers on-site travels Key Achievement:- Led business continuity program and assured compliance to company and industry audit- Led a cross-department team to develop network monitoring and reporting tool, implemented it in more than 10 sites globally, and led improvement project which increased network performance by 25% of defined index

Shanghai City, China

 Managed IT operations of local IT environment to support 2000+ employees Managed Linux and Windows servers (Web, FTP, DNS, DHCP, LDAP, Database, SharePoint) as well as LAN and WAN networks Performed server builds, operating system upgrades, security patching, capacity planning, performance tuning, and monitoring, in-charge of optimizing and upgrading of existing IT tools Key Achievement:- Successfully migrated existing servers to VMware virtualization environment - Improved availability and performance by implementing cluster and network aggregation- Developed and implemented log monitoring and analyzing tools to respond automatically and notify support staffs- Honored MVP (Most Valuable Player) of the organization for multiple years

Shanghai City, China

 Trained customers on HPUX/Linux system and networking administration Delivered IT service management training to customer IT managers and senior staffs Managed lab environment consisting dozens of servers/workstations and networking equipment Key Achievement:- Trained hundreds of customer technical staffs with high satisfaction feedback > 4.2/5.0

Shanghai City, China

 Provided remote and on-site support to HPUX customers, whose system environments typically consisted HP servers, HP ServiceGuard high availability clustering solutions, enterprise storage and network products Designed and implemented HPUX based technical solutions, including patch analysis, backup strategy and solution, high availability clustering, network management, internet servers setup, host and network security enhancement Key Achievement:- Received best performance rankings in country wide organization consistently- Recommended as one of top engineers in the company and participated in an elite team to provide 2nd line escalation support to 100 engineers

Master, Computer Science - Pattern Recognition And Intelligent Control

Bachelor, Electrical Engineering