My contribution to CommGate as a Team Lead

• To supervise technical support team
• To report on a weekly basis to management on support operations progress
• To coordinate with external/out-source support personnel
• To verify, audit and ensure technical documentations are in proper order

My contribution to CommGate as a Systems Engineer

• Installation, configuration, migration and troubleshoot different types of open source and paid version of operating system and software like, Linux, Windows, Zimbra, Zenoss, VMware, Citrix, Kaspersky Business Solution, Adito, OpenLDAP, OCS NG and more.
• Providing customers and partners with in-depth technical assistance in the use of products and solutions
• Working with sales and professional services teams to ensure customer satisfaction
• Providing project support - Understanding of scope of work and troubleshooting problems to a point of problem isolation.
• Research into possible solutions for the problem.
• Support of existing consumer level products.
• Scripting and application building/maintenance

My contribution to Somewhere In as a System Administrator

• Provided Linux/Windows administration, security support.
• TCP/IP network design and implementation.
• Installed and managed server and client software, security infrastructure.
• Assessed threats, risks and vulnerabilities from emerging security issues.
• Published Security updates newsletter for technical groups.
• Worked on Bind, Apache, Nginx, IIS, Samba, OpenVPN, Squid, SSH, Telnet, Iptables and ISA.

My contribution to Escenic as a System Administrator

• Provided Linux/Windows administration, security support.
• TCP/IP network design and implementation.
• Worked on Bind, Apache, IIS, Samba, OpenVPN, Squid, SSH, Telnet, Iptables.
• Provided technical support to desktop users.

My contribution to Stamford as an IT Officer

• Used knowledge of Bind, Apache, IIS, Samba, Active directory, Squid, SSH.
• Firewall creation and maintenance using Iptables in Linux and MS ISA Server.
• Responsibilities included end-user troubleshooting, document creation, and system design.
• Acted as an intranet network engineer to create and administer network system.
• Worked on LAN, WAN, VOIP Network, Software Development and Web Application Development.

My contribution to SCOM as a Software Developer

• Provided technical support for System Analysis & Design, Software Development and Webpage Development.

Establishing Intranet & Internet

Established network & managed it using Server OS: Linux RHEL AS, Debian, Windows 2003 and Client OS: Windows 2000 Professional and Windows XP, Windows Vista, Mac OS X, Ubuntu.

Zimbra Email Server Implementation and Migration

Successfully installed, configured and migrated Zimbra single and multi-server for various clients.

Software Development

“Student Information and Examination System” Customize software for Stamford University to maintain students’ entire academic information, registration, examination schedule, grading, and result publication etc.

Used software (Front view : Visual Basic 6, Backend : SQL Server)

Web Design & Development

For Stamford University Bangladesh (http://www.stamford.ac) For Bengal Studies Conference (http://www.bengal-studies-conference.org), For Euro Student Consultant (http://www.eurosc.net), For Newspaper (www.banglarabha.com)

Platform : PC (IBM/Mac)

Operating Systems :
Debian, RedHat, CentOS, ClearOS, Ubuntu, MacOS X, Windows XP/Vista/7, Windows Server 2003/2008

Security Software:
Firewalls (Iptables, IPSec), OpenSSH, VPN, TCP Wrappers, Tcptrack, Tcpdump, Ethereal, Ntop, Nessus, Nmap, Dsniff, Logwatcher, Syslogd, SyslogNG, Windows ISA server.

Internet/Intranet Software:
Apache Web Server, Squid Proxy Server, Samba Server, IIS, Postfix, Sendmail, QMail, Exim, Zimbra, DNS (BIND), Mailman.

Other Linux/Unix Services/Software:
Zenoss, OpenLDAP, NetBackup, rsync, MRTG, Cacti and Adito.

TCP/IP Protocols:
DNS, SMTP, HTTP, HTTPS, SSH, NFS, CIFS/SMB, SSL/TLS, DHCP/BOOTP, POP, IMAP, FTP, PPP, SNMP.

Virtualization:
VMware ESXi, VMware vSphere Client and Xen Hypervisor

Commercial Hardware:
3com/Dlink Layer 2 manageable switch, Linksys VPN router, Cisco Pix.

Office Suites:
Microsoft Word 2007/2010 (Full function to make documentation, using template wizard, page layout, table creation and handling), PowerPoint (Full presentation with sound system) and Excel (Salary sheet, Creation and using macro).

E-mail:
Zimbra, Microsoft Outlook, Eudora

Graphics Design:
Adobe Photoshop, Adobe Illustrator

Web Development:
HTML, DHTML, PHP, Dreamweaver MX, Microsoft FrontPage, Java Script, Joomla.

Programming Language:
Pascal, C/C++ (Program Control Statement, Functions, Array & Pointers, Structures, Union, Input, Output & Disk files, Have object oriented concept), Assembly Language (The Processors status & the FLAGS register, Flow control instructions, Logic & Shift instruction, Multiplication & Division instruction, Array & Addressing modes, The String instruction, Text display & keyboard programming), Visual Basic 6 (Object oriented programming, Creating object & classes, Working with object & collection, Menus & Toolbars, Using the printer object & Crystal reports, Reading & writing text files, VB data control, Creating queries in VB, Jet DAO, Advance data access methods,  Integrating with other application, Web development with VB, Handling with Windows API, INI files & the system registry control, Professional VB development), VB.Net, Java (Object based programming, Application & Applets, Control structure, Graphics, Handling graphical user interface components).

Database:
Microsoft Access, MySQL, SQL Server, Oracle (Database creation & maintenance, Table creation, Data insert, Update, Delete and All kinds of query structure).