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Flag of Vietnam Ho Chi Minh, Vietnam
Member since December 23, 2012
4 Recommendations


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I’m fluent in working with Linux OS and open-source software, familiar with almost all variants of Linux distributions (especially CentOS, Debian, Fedora, Arch, Ubuntu) and software such as Apache, MySQL, Redis, Subversion, Squid, StrongSwan, Redmine, BIND, iptables, etc.) With more than 10 years in managing Windows network environment, beside Windows Server operating system, I'm knowledgeable in many of Microsoft technologies, e.g., Active Directory, Exchange, SharePoint, System Centers, Lync, ForeFront, MSSQL, etc. BASH and Python are the 2 languages that I can use very well in building tools and back-end programs/services. I'm also able to implement LetsEncrypt, a free solution for SSL. Its certificate request/renew could be done automatically or manually.
$25 USD/hr
97 reviews
  • 99%Jobs Completed
  • 100%On Budget
  • 100%On Time
  • 46%Repeat Hire Rate


Recent Reviews


Chief Technical Architect

Jun 2014 - Oct 2012 (1 month)

- Chief architect of Sendmass product webapp, APIs and bulk-email-sending system - Overseeing technical infrastructure/servers and being PM role for whole product development - Creating dev environments & processes, collaboration & PM tools - Automating dev works (code deploys, DB deploys, etc.), configurations (auto-config), log parsing, backup, monitoring by BASH / Python

IT R&D Manager, IT SO Manager

Sep 2008 - Oct 2012 (4 years)

- Built company portal (SharePoint), collaboration tools (SharePoint, Lync, Asterisk), inside e-newspaper (Wordpress) - Built automation for soft- & hard-ware inventory, software & OS deployment, IT daily tasks (Scripting, MS System Center) - Built virtualized desktops for shift workers (Xen Desktop, Hyper-V) - Provided IT services for 2000 employees in 3 sites, mostly MS-based technologies hosted in 50+ servers: Exchange, AD, GPO, FSS, DFS, Network Services, Printing, End-point Security, etc.

Technical Operation Lead

Jan 2008 - Aug 2008 (7 months)

Was responsible for all the servers & infra hosted Payoo website: - Installed, configured Linux-based servers: Apache, MySQL, Syslog, Bind, Postfix, SpamAssassin, Snort, Subversion, NTPd, and more... - Installed, configured Windows-based servers: IIS, MSSQL, SolarWinds, BackupExec - Built-up core network infrastructure, SAN Storage System - Implemented redundancy & high availability mechanisms: RAID, NIC Teaming, Load Balancing, Clustering, MultiPath I/O Storage, Trunking Switches, DR Plans

System Engineer & Lead

Sep 2003 - Jan 2008 (4 years)

Installed, configured and consulted on: - Microsoft technologies: Windows Server, Active Directory, Exchange, Group Policies, Network & Infrastructure Services (i.e. DNS, DHCP, RRAS, FSS, DFS, RDS, RADIUS, CA, etc.) - Backup systems: BackupExec, NetBackup, ARCserve Backup, HP Data Protector, MS Backup - Clustering services & technologies: MS Cluster, Oracle RAC, NetApp, DAS/NAS/SAN Storages - Security solutions: Symantec, McAfee, TrendMicro, CheckPoint, MS ISA Server, MIMESweeper, GFI


MCSE | Security (2008)

MCP ID: 3561306

CompTIA Linux+ (2008)

CompTIA ID: COMP001007993579

CompTIA Security+ (2009)

CompTIA ID: COMP001007993579


  • Numeracy 1
  • US English Level 1
  • Unix Level 1
  • Python Level 1


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