Mahmud Husain Khan Revision: 17.10.2007-01 email: mhkhan@mhkhan.net web: http://mhkhan.info phone: 88.017.13363900, 8802.882.8704 Updated: October 18, 2007 Objective: To obtain a position in IT Management and / or as a System Administrator / System Analyst Qualifications: ** 14 years of experience in IS / IT fields at various locations in the world including the United States: * Design, Commissioning & Maintenance of Data Centers for Internet Service / Application Service Providers, Small & Medium sized Private Companies & Corporations. * Design, Commissioning & Maintenance Hybrid Fiber Coax, Fiber Network. * System Administration of heterogeneous networks based on UNIX / Windows systems & servers. * Expertise in Active Directory Design, Commissioning & Maintenance (Windows 2000 / 2003) including UNIX based Single Sign-On (SSO) Network Design, Commissioning & Maintenance. * Expertise & experience in Network & Systems security including taking pro-active measures against Malware & Spyware issues by using Tarpits / Honeypots. Technical Skills: * x86 based Workstation / Server Hardware * Blade Servers / Telecom HLRs * ICL DRS 6000 Mainframe * ARRIS / SA CMTS and related equipment * VoIP Origination & Termination equipment * Cisco 3600, 7204 NP400 Routers * ZyXEL, Cyclades, 3COM TS / Modem pool * SMC, D-Link, Micronet, Asus Switches / Hubs * WiFi related hardware * Gigabit Ethernet, PoE Switch, Hubs * Fiber Optic Network Design & Maintenance * Network Security using * IPTables based Firewalls * Tarpits & Honeypots * SunOS 4.x, Solaris v 2.x, 7, 8, 9 & OpenSolaris 10 * Kernel recompiles, pkgadd, security * Red Hat Ent. (to v5), Slackware & SuSE Linux * Proxy (Squid) install / optimization * Apache Web Server (v1.3 + v2.x) * DNS (BIND & Variants), DHCP (ISC) * Qmail, Sendmail, Postfix, BGP * ReiserFS, NIS+, Samba, LDAP * Windows 3.x / 95 / 98 / ME / XP / Vista * Windows NT 4 / 2000 / 2003 SP2 Enterprise * MS Active Directory (2000 & 2003) * Group Policy, Patch Management, Local WSUS, Remote / Unattended Installs * MS DHCP, DNS & WINS Servers * Microsoft IIS / ISA / Exchange / SMS / MOM Professional Experience: Company: Prisma Digital Ltd., Dhaka, Bangladesh. Position: Chief Operating Officer – Internet & Telecom Operations Employment Period: Aug 2006 – Present PORTFOLIO: * IT Management Tasks: Performed Feasibility Study, 5- Year Operational Cost Analysis, 5-Year Revenue Projection, Return On Investment analysis for providing Internet Services, Voice Over IP & IP TV via Hybrid Fiber Coax Network and CATV Head End. * Initiated process for setting up infrastructure, data center, personnel hiring & training, customer service process flow and administrative framework. * Internet & Networks: Designed & commissioned Data Center based of CentOS 5 Enterprise Servers running Qmail, Apache web server, Squid proxy server & content filtering to service existing 10,000+ client base and capable of expansion to 50,000+ clients via the company’s HFC Network. * Designed & commissioned CMTS (Cable Modem Termination System) to offer Internet, VoIP & IP TV services (Triple Play) through a single RJ-6 cable to new & existing cable TV clients. * Expanded Fiber Optic Network to deliver pilot FTTH project and Corporate Internet Connectivity to sister concerns in Dhaka and immediate vicinity. * Cable Television: Maintenance & expansion of the existing Hybrid Fiber Coax (HFC) network of Prisma Digital to offer Internet, Cable TV, IP Telephony and related services – one of the most advanced networks in South Asia. * Maintenance & expansion of the 88 Analogue Channel Head End of the Cable Television Network – biggest and most advanced in Bangladesh. * Database: Designed & assisted in creation of Client Provisioning System with MySQL based database. ENVIRONMENT: RHEL 4, Fedora Core 3/4/5, Solaris 10, Windows Vista, XP Pro, 2000 Server, 2003 (SP1 / SP2) Server, Exchange 2000 / 2003, Cisco Routers & ALLOTT B/W Manager Hardware. Company: Presidency Uuniversity, Dhaka, Bangladesh. Position: System / Network Admin, Head – IS / IT Services Employment Period: Dec 2003 – Jul 2006 PORTFOLIO: * IS / IT Services Manager: Formulated & implemented policies for the newly formed IS / IT Services Department of the University. Updated and managed policy and related decisions as University expanded in terms of students and campus area. * Headed IT Committee comprising of University Admin, Faculty and Student representatives to enhance usability and expand services while following strict security and budgetary guidelines. * Internet & Networks: Designed Campus LAN spanning 2 Eight Storied buildings using Single Mode Fiber Optic as backbone using gigabit media converters to connect Cat 5e based LAN. * Procured & commissioned 220 workstations & 14 Network Servers (10 Linux [Red Hat Enterprise Linux, 1 Windows 2000 SP4 Server, 3 Windows 2003 SP1 Servers]) for University Intranet & Internet Services. * Connected to the Internet via Fiber Optic (1MBPs B/W) as primary and Radio Link as backup route with BGP to manage redundant link and routing issues on Linux. Obtained APNIC membership and a /21 portable Class C address block to facilitate network expansion and have less reliance on upstream service provider for various issues including routing, DNS, abuse etc. * Integrated Windows 2000 Server, Active Directory with Group Policy, Exchange 2000 Server with existing Linux based servers with Single Sign On capability to facilitate scheduling of faculty meetings, faculty email, dynamic content & real time interaction with the student body. Updated to Windows 2003 Server SP1 thereafter. * Commissioned Windows Server Update Services (WSUS) locally to centrally manage updates to Microsoft products. * Installed Symantec Enterprise Firewall & Symantec Enterprise Anti-Virus Server to centrally manage & monitor Anti Virus, Malware & Spyware issues on the intranet. * Designed, installed and maintained student email system with CentOS 3.x Linux servers with worldwide access via webmail, IMAP, POP3 & “WebDisk” system for online file storage. * Designed & operated Presidency University website via MAMBO Open Source Content Management System. * Day-to-day Administration of 3500+ Student, 180+ Faculty, Staff & Administrative users of the Campus Intranet. * Re-compiled, optimized & administered Apache, Squid Proxy, Sendmail, BIND DNS, ISC DHCP, Kernels. * Database Related: Designed & assisted in creation of Student Information Management System (SIMS) for the University with Oracle 9i backend & php web based front end (installed on Red Hat Linux 9 Server). ENVIRONMENT: Red Hat Enterprise Linux 3.1 / 4, Fedora Core 1 / 2 / 3 / 4, CentOS 3.1 / 4, Trustix Secure Server, Solaris 9, Windows XP / 2000 / 2003 Server, Active Directory, Exchange 2000 / 2003, Cisco, Micronet, SMC & D-Link Routers / Switches / Hubs / Firewalls. Company: CDI Corporation, New York, NY, USA. Position: System Analyst / Administrator Employment Period: Feb 2002 – Nov 2003 PORTFOLIO: * Internet & WANs: Migrated from Verizon’s DSL service via single router to T1 connectivity implementing Internet Access Gateway, Proxy, Content Filtering on Red Hat Linux Enterprise Servers with DMZ and NAT to conserve IP addresses as per company policy & connected 2 Manhattan area offices for easier collaboration, control & cost management related to IS / IT Services. * LAN & Application Services: Commissioned Windows 2000 Server with Active Directory to centrally manage and enforce policy of all office workstations and Laptops with dedicated roaming profiles. * Commissioned Windows Server Update Services (WSUS) locally to manage updates & patch management of Microsoft Operating Systems & other Microsoft products and reduce redundant bandwidth usage. * Commissioned Exchange 2000 Server to replace offsite email hosting for easier & faster access, facilitate collaboration and maintain tight security of company documents and emails. * Day-to-day administration of 3000+ Users of Intranet on Red Hat Linux 8.x, Windows 2000 Servers with Single Sign On capability to ease help desk calls by users. * Serviced & upgraded Compaq / HP server hardware / software as authorized Compaq / HP service provider. * Security: Administered Business Continuity (security) issues with Checkpoint FW-1 for maximum security. * Designed & Commissioned IDS (Intrusion Detection System) to monitor Network Security and perform pro- active steps to enhance security. * Database Related: Executed routine backup of MySQL & Oracle based databases & mission critical db servers. ENVIRONMENT: RH 7.x / 8.x, Solaris 8/9, Windows XP / 2000 / 2003 Server, Active Directory with Group Policy, Exchange 2000, Microsoft ISA Server, Cisco Catalyst Switches, LinkSys Routers / Hubs / Firewalls. Company: NIIT – Computer Education Center, Dhaka, Bangladesh. Position: IT Division Director / System Administrator Employment Period: Jun 1999 – Jan 2002 PORTFOLIO: * IT Operations Management: Created & enforced Acceptable Use Policy of NIIT IT Training Center (IT Education Institution with centers worldwide). * Internet & Networks: Designed & Commissioned LAN / WAN for Training center which included Solaris 7 servers, Linux Servers (Redhat 7), Linux workstations (Mandrake 8), Windows NT 4.0 / 2000 servers with Single Sign On in a Multi Domain / Multi Server environment. * Day-to-day administration of 950+ users at the education center who practiced on NT & UNIX based servers. * Administered Apache, Sendmail, DNS Servers as well as Network security related issues. * Provided real-time interaction of head office personnel with Learning Center staff by implementing VPN solution. ENVIRONMENT: Solaris 2/7.x, Linux 6/7.x, Cisco 2600 Routers, Windows NT 4.0 / 2000 Advanced Servers, Apache 1.3/2.x, Squid Proxy, Sendmail & Checkpoint Firewall. Company: DhakaCom Ltd., Dhaka, Bangladesh. Position: Director Operations / System Administrator Employment Period: Jun 1997 - May 1999 PORTFOLIO: * IT Operations Management: Created & set company policy guide lines, issue escalation procedures as well as general administrative tasks of an Internet Service Provider. * Internet & Networks: Designed & Commissioned complete company LAN with WAN connectivity to branch offices and corporate head quarters. * Designed & Commissioned Data Center with 56K Dial up Modem pool consisting of 4 E-1 connections to 3COM Total Control Manager, ZYXel Modem Pools and Cyclades based corporate dialup connectivity with RADIUS authentication, Cisco 2610, DLink manageable switches & routers and backend servers including Linux servers running Squid proxy, Qmail, DNS, Apache for Virtual Domain Hosting services, WU-FTPD Server for ISP clients. * Commissioned MS Proxy, Netscape Proxy, IIS & Windows NT & 2000 advanced servers for intranet usage. ENVIRONMENT: Windows NT/2000/98/95, Linux 6.x, Sun Solaris 2.x, DLink router & switches. Red Hat Linux 5.x, Solaris 2.5 on x86 servers, Cisco Router & HP switches. Company: Tandy Corporation (Radio Shack), Houston, TX, USA Position: System Administrator / Technician Employment Period: Aug 1995 – May 1997 PORTFOLIO: * IS / IT Service Management: Managed Computer City's (Tandy / RadioShack) Technical Department, Webster, Texas location. * Internet & Networks: Provided Network Installation and Support to Tandy's Corporate Clients with in the Houston, TX area. * Connected all 5 Houston area retail locations via ISDN (128K) connectivity to better manage technical support issues. * Troubleshot daily problems related with hardware or software of clients as well as internal computer related hardware. * Administered users on Linux Database server which was used to track all service related issues. * Database Related: Performed routine manual backup and scheduled automatic database backups. ENVIRONMENT: Windows NT/95/98/3.11, SunOS Solaris, Slackware Linux, Ms Office & HP Switches. Company: Phoenix DataNet, Houston, TX, USA Position: Assistant System Administrator Employment Period: Jan 1994 - Jul 1995 PORTFOLIO: * Internet & Networks: Assisted in System Administration tasks of Digital Alpha Servers of Phoenix DataNet. * Hardware Maintenance of Phoenix DataNet's Internal FDDI Network. * Provided Customer Support for Leased Line / Dedicated port Clients. ENVIRONMENT: Digital UNIX / AIX, HP-UX, FreeBSD, SunOS 4.1, Windows NT 3.5, Cisco & ZyXEL equipment. Educational Qualification: * Bachelor’s Degree in Economics & Computer Science from an accredited four-year university in the United States. Eastern Connecticut State University, Willimantic, Connecticut, USA. University of Houston, Houston, Texas, USA. * O’Levels: 5 Subjects at British Council, Dhaka. South Breeze School, Dhaka, Bangladesh. References: Available upon request.