Allan Tan

**** ******* *****, ***********, **. L*N 5C4 • 647-***-**** • acxrj8@r.postjobfree.com

Professional Summary

IT professional with 10+ years’ experience on IT infrastructure and virtualization that keeps up-to-date with current technology. Highly analytical and self-motivated candidate with notable success on Windows Services Deployment, Maintenance, Cisco Networking and System Virtualization. Demonstrated skills in diagnostic analysis, system troubleshooting and innovative solution developing in support of corporate objectives. Made positive contribution by providing technical expertise in the field of computer information and technology.

Excellent verbal and written communication skills, an independent thinker, a fast learner as well as a strong team player. Performs confidently and effectively under pressure and thrives on challenges, committed to quality in every task and personal interaction with coworkers and users.

Technical Proficiency

Microsoft

Windows sever 2003/2008 and 2012 R2, SCCM 2007/2012, MDT2013, Hyper-V, DHCP, DNS, Group Policy, Active Directory, DFS, IIS 6-7, VPN, Remote Desktop, Exchange Server 2010/2013, MS Office 2010, 2013, PowerShell scripting

Platforms

Windows 2012, 2008 64 bit R2, Windows 2000/2003, Linux(Red hat, Ubuntu), Windows 8.1/7/XP

Networking

TCP/IP, LAN, WAN, WLAN, VLAN, QoS, VoIP, IPsec and SSL VPN, NAT, OSPF, EIGRP, BGP, Ethernet Switching, Routing, Cisco ASA Firewall

VMware Products

VMware vSphere ESXi6.0/5.5 and 5.1, Hyper-V, VMware vCenter, VMware vMotion, VMware Consolidate Backup (VCB), VMware Converter.

Citrix Products

Citrix Xen Server 6/5.0

Software

Symantec/Kaspersky Internet Security, Firewalls, Microsoft SQL Server 2012, Microsoft Office Suite 2010/2013, IIS, Symantec & Acronis System Backup

CERTIFICATIONS

MCSA: Windows Server 2012 R2

CCNA: Cisco Routing and Switching

OCA: Oracle 9i Administration

MCTS: Windows 7 configuration

A+ certificate

Professional Experience

System Administrator

OACCAC (Feb, 2016– Present)

(Ontario Associates of Community Care Access Center).

Toronto, Ontario

System Administrator:

Identified, investigated and solved critical DNS, replication and topology issues in 2008 AD infrastructure.

Planed, documented and implemented migration from 2008 AD to 2012 AD infrastructure. Finalized procedures of clean migration of domain controllers.

Greatly improved AD performance by solving AD authentication route, replication topology, DNS configuration issue.

Greatly improved AD reliability by reorganizing AD cross-site replication, and setting up status monitoring plan.

Monitored and troubleshoot LDAP performance issue on DCs by using SCOM and PAL (Performance Analysis of Logs)

Maintained the PKI and certificates for security on Web servers, sharepoint servers, effectively managed group policies and replications

Secure critical data transmission by applying IPSec policy on critical data traffic from database servers to backup servers

Streamlined the OS deployment through SCCM with various OS to head-office and 14 OACCAC sties.

Automated the periodical Windows updates through SCCM software updates in headoffice and cross 14 OACCACs

Generated Windows 8.1 Gold Image with updates, applications for Dell Corporate Factory Imaging in batch.

Built Clustered Hyper-V servers on Dell R710 platform and configure the network teaming. Migrated virtual machine among hosts

Deployed and updated virtual machine from templates in SCVMM.

Configured and troubleshoot the virtual Network of Hyper-V servers for management, VM, storage VLAN

Allocated the storage space for virtual and physical servers from Dell compellent SC8000 and EMC Unity SAN storage

(June, 2014– Jan 2016)

Precise Park-link Inc.

Toronto, Ontario

System Administrator:

Installed Windows 2008 and 2012 server on Virtual and on physical servers and migrated AD from Windows 2008 to Windows 2012 R2 servers following the migration procedure

Automated software deployment in Head office by applying SCCM 2012 application deployment and group policy ( Microsoft Office, Web browsers, pdf reader, Symantec end point protection)

Used MDT 2013 and SCCM 2012 to capture images of Windows Server and client OS and deployed the images using MDT 2013 and SCCM 2012 Lite-Touch deployment.

Deployed and maintained Microsoft Infrastructure: Active Directory, IIS, CA, DNS, DHCP, DFS, RRAS (VPN), WSUS

Installed and created cluster using 2008 R2 and 2012 R2 servers and Solar-winds ISCSI target

Created and tested Group Policies for different business groups for their requirements

Designed and implemented the Direct Access and Remote Desktop Gateway service for corporate network access from internet

Provisioned, implemented and managed corporate email and messaging services using MS Exchange 2013 Enterprise

Accomplished external access to Exchange Server 2013 by deploying Autodiscover, Outlook anywhere and ActiveSync for internet users and mobile devices

Conducted NAS & SAN storage management (Synology, NetApp, RAID, HA, iSCSI, NFS)

Managed disaster recovery strategy (Symantec Backup Exec and Veeam 8 using NetApp network storage)

Network Administrator:

Setting up, maintaining and troubleshooting corporate networks (LANs and WANs, VPNs with VLAN support), various networking routing protocols (OSPF, MPLS), router and switch support (including Cisco IOS)

Managed protocols: VTP, Trunking, Spanning tree

Managed routers and switches of all layers (3600, 2800, 2951, Catalyst 3500, 3750, 2960,etc.), documented network policies and diagrams

Managed Site2Site VPN to 23 remote sites with fully redundant solution as well as SSL Anyconnect VPN. Designed, recommended SSL VPN (Anyconnect)/ASA solution with user authentication/authorization through Active Directory

Implemented high availability topology for routers, switches and firewalls to avoid single point failure and to provide disaster recovery ability

Re-constructed site network on cisco switches and routers with VoIP, QoS and VLAN to solve audio and video traffic issue

Used Solarwinds monitoring tool to monitor servers, applications and network performance

Virtualization:

Built, Configured, and tested ESXi hosts, Virtual Center, VMware Data Recovery and VM recovery.

Utilized VMware vCenter Converter for P2V and V2V migrations of production and development servers.

Deployed and updated virtual servers from templates in vCenter.

Created clone VMs, Performed VM cold/hot migrations and Storage with vMotion

System and Network Administrator (May, 2011– Jun, 2013)

Canada Computers

Richmond Hill, Ontario

System Administrator:

Installed, configured and maintained of 5 enterprise-level Dell production servers (iDRAC)

Created and maintained Microsoft services: Exchange 2010, IIS, DNS, DHCP, DFS, and WSUS

Solved Active Directory objects/containers recovery issue by applying AD Recycle Bin and AD Snapshot for instant object recovery.

Administered and maintained Users, Groups, OUs, permissions and delegations for role based access control over the whole organization.

Designed, planned and implemented Group Policies for demo computers, application deployment, remote access, and system security. Verified and resolved Group Policy problems.

Performed daily and full backup/restored operations using Symantec Backup Exec, ensuring all required system data are successfully backed up.

Installed, configured and deployed Exchange 2010 servers in the organization to upgrade the company’s mailing system from earlier version and provide features as OWA, Auto-discover, Outlook Anywhere.

Configured and rolled out the outlook client setting for accessing head-office email server throughout the whole company.

Conducted Exchange mailbox data backup and recovery, mailbox relocation, IIS Application Request Routing, Exchange Server migration from 2007 to 2010, Exchange Server certificates management.

Planed and configured Windows 7 deployment network with MDT 2012 deployment tools for automated Windows OS and application deployment in local network

Conducted server backup and hard drive imaging using Windows System Backup, Symantec Exec and Acronis TrueImage Backup Suites.

Implementation of VMware ESXi servers with up to 10 guest vms. Hypervisor implementations included scheduled backups and shutdowns. Utilization of VMware Workstation/Player, vSphere Client, and Converter.

Planned and implemented Windows server migration, upgrade, virtualization with VMWare Esxi and Citrix Xen server to meet the ever-growing demand on system resources.

Network Administrator:

Provided primary implementation and maintenance of corporate-level networks based on the thorough understanding of the corporate’s business. Configuration scenarios mainly include routing (OSPF, BGP), switching (STP, VLAN), GRE, MPLS VPN, network security (VPN, NAT/PAT, firewall), Wireless on Cisco routers and switches.

Re-constructed site network (LAN, WAN, Wireless, Active Directory, DHCP, DNS) to resolve existing problems including IP confliction, frequently offline and potential breach risks, and maintained it as a reliable network

Established enterprise wide IPsec VPN with Cisco routers and ASA 5520 firewall between sites and from internet

System Administrator (Aug, 2006 – Sep, 2009)

Bombardier Aerospace

Toronto, Ontario

System Administrator:

Migrated IBM desktop computers and laptops from Windows NT to Windows XP using Microsoft SMS 2003 and Business Desktop Deployment (BDD).

Performed Windows OS imaging and deploying on IBM T42 Laptops and M52 Desktops using Microsoft Lite-Touch Technology (BDD), i.e. the SMS OS deployment feature pack.

Captured/Transmitted user profile using USMT from original version to Windows XP.

Managed Active Directory sites; replication schedules, site links and boundaries, used ADUC to create and manage accounts in Active Directory. Applied DcDiag, NetDiag techniques for AD troubleshooting.

Managed local, roaming, and mandatory profiles, planed strategy for placing Global Catalogue (GC) and evaluated the need to enable Universal Group Caching.

Scheduled daily and full backup/restored operations using Symantec Backup Exec, ensuring all required system data are successfully backed up, and secure backup media.

Used SMS Remote Connect and Lotus Sometimeconnect applications to connect remotely to user’s machines to resolve hardware and software related issues.

Troubleshoot WAN, VPN and LAN wireless connectivity related problems and setup wireless network using Linksys routers, resetting Windows XP network passwords using Active Directory, and also reset AS400 passwords

Used a Global web-based Remedy software for logging calls and Issue tickets for hardware and software related problems, escalating problems to appropriate Department.

Troubleshooting & Administration of Exchange Server 2007 Mail Routing / Mail Flow.

Monitoring Queues on all exchange Server, configured alerts. Performing Offline Defrag. on databases

Deployed the TS server role services, monitored and provided troubleshooting for TS Gateway Connections. Configured and managed TS Licensing within the TS Licensing Manager

Software Developer (Sep, 2000 – Nov, 2004)

MDS Sciex Inc.

Toronto, Ontario

Served as a key software developer in new Mass-spectrometry software development for a joint-adventure project. Partnered with management and research teams to ensure a refined structural design and solid implementation. Undertook system integration test with firmware team and offsite UI group. Coordinated software integration between offsite UI team and firmware team in Mass-spec Service Diagnostic Application project

Worked with medium size team of software developers to brainstorm and implement ideas for a Mass-spectrometry software in acquiring and processing molecule data with leading-edge concept in the industry

Proposed direct solutions successfully as a key team member on structural design, coding algorithm, and bug-fixing issues

Designed and developed core components in real-time device control and data transmission using multitasking for quick device control from UI and automatic response to events on Mass-spec device

Implemented Data transmission component using COM/COM+ and Event Driven for best flexibility and most efficient data flow control

Planned and initialized redesign of existing software application, utilizing object-oriented design and COM component to achieve a great performance leap.

Gained client's trust on company's quality products by adopting mature software testing & troubleshooting measures

Software Developer (Oct, 1997 – May, 1999)

Hitachi Shipbuilding Inc.

Osaka, Japan

System Integration -- Integrated Console Application of “Coil Production Line Automation System” with middle layer control software with automatic event updating and status querying. Integrated Desktop Control Application with “Flatness Measuring Machine” to render the 3D object surface

Software Troubleshooting – troubleshooting for Data transmission problems, Multithread- Synchronization issues, Core Components States updating issues, Console Application updating issues, Database data accessing issues, Database report printing issues, Console scheduled task issues.

Hardware Troubleshooting – Solved low OpenGL performance issue on video card for 3D motion, RS422 port data transmission issues on device interface card, Device Interface Card compatibility issues on various computers. Database accessing issue from client to remote server, Resolved the computer hardware crash in production environment

Database Development – Design database schema for the “Coil Production Line System”. Constructed and implemented Oracle Database for testing and production. Implemented Database interfacing components for best performance

Education

2010– 2011 Everest College, Mississauga ON.

Diplomar, Network Administrator

2005– 2006 Toronto College of Technology, Toronto ON.

Diplomar, Database Administrator

1996– 1997 Osaka University, Osaka, Japan

Pre-Master Program, Computer Image Processing

1988 – 1993 Beijing University of Polytechnic, Beijing China

B.S. Microelectronic Engnieering

Additional Information & Interests

References Available Upon Request

Contact this candidate