Network Engineer with 8 years of Experience in Designing, Implementation and Operations of enterprise data networks.
Excellent Knowledge about TCP/IP and OSI models.
In depth understanding of IPV4 and implementation of Subnetting
Implemented EIGRP, OSPF & BGP routing protocol administration.
Provided services in many industries such as Consulting, Telecommunications and IT
Hands-on experience on Up-gradation of Cisco IOS on different Cisco devices and modules.
Maintain a thorough understanding of the basics behind the Internet and its workings (DNS, Security, IP Routing, HTTP, VPN, Email Routing etc.).
Experience in installing and configuring DNS, DHCP server.
Strong hands on experience in installing, configuring, and troubleshooting of Cisco 7600, 7200, 3800, 3600, 2800, 2600, 2500 and 1800 series Routers, Cisco Catalyst 6500, 4500, 3750, 2950 and 3500XL series switches.
Proficiency in configuration of VLAN setup on various Cisco Routers and Switches.
Experience in layer-3 Routing and layer-2 Switching. Dealt with Nexus models like 7K, 5K, 2K series, Cisco router models like 7200, 3800, 3600, 2800, 2600, 2500, 1800 series and Cisco catalyst 6500, 4500, 3750, 3500, 2900 series switches
Administration and diagnostics of LAN and WAN with in-depth knowledge of TCP/IP, NAT, PPP, ISDN and associates network protocols and services.
Experience with Firewall Administration, Rule Analysis, Rule Modification.
Responsible for designing and deploying various network security & High availability products like Cisco ASA and Checkpoint Firewall products.
Experienced in configuring and troubleshooting of Palo Alto, Juniper Netscreen & SRX Firewalls and their implementation Experience in site-to-site and remote access VPN solutions.
Knowledge on F5 load balancers, its methods, implementation and troubleshooting.
Highly motivated with the ability to work independently or as an integral part of a team and Committed to highest levels of profession.
Responsible for Checkpoint and Cisco firewall administration across global networks.
Worked on Cisco Catalyst Switches 6500/4500/3500 series.
Extensive understanding of networking concepts, (IE. Configuration of networks, router configuration and wireless security, TCP/IP, VPN, Content Filtering, VLANs, and routing in LAN/WAN, Ethernet Port, Patch Panel and wireless networks.)
Configuration of Network and Security devices such as Cisco routers and switches (Cisco 7600/3500/Nexus 7K/5K), Firewall (Checkpoint R75/Gaia and Cisco FWSM), Load Balancers and DNS and IP Manager (Infoblox)
Black listing and White listing of web URL on Blue Coat Proxy Servers.
Administration of production Windows Servers infrastructure that includes Domain Controllers, IIS Web Servers, SharePoint, File and Print and FTP/SFTP servers.
Cisco router platforms : 2500, 2600, 2800, 3600, 3700, 3800, 7200, 7609.
Cisco Switch platforms : 2900XL, 2950, 2960, 3560, 3750, 4500, and 6500.
Firewalls & Load Balancers : Cisco ASA 5585, 5550, 5540, Juniper SRX5400, 5600,
5800, Juniper Netscreen 6500, 6000, 5400. Juniper SSG Firewalls, Palo Alto PA-3060/2050, F-5 BIG-IP LTM (3900 and 8900), Blue Coat SG8100, AV 510, AV810.
Routers : Cisco routers (1900, 2600, 2800, 2900, 3600, 3800, 3900,
7200, 7600), Cisco L2 & L3, Juniper routers (M7i, M10i, M320)
Switches : Cisco switches (3560, 3750, 4500, 4900 & 6500), Nexus (2248,
Routing : RIP, EIGRP, OSPF & BGP, Route Filtering, Redistribution,
Summarization, Static routing
WAN Technologies : FRAME RELAY, ISDN T1/E1, PPP, ATM, MPLS, leased lines,
LAN Technologies : Ethernet, Fast Ethernet, Gigabit Ethernet, NAT/PAT, FDDI.
Secure Access Control Server : (ACS) for TACACS+/Radius.
VOIP Devices : Cisco IP phones, Avaya.
Routing Protocols : RIP, OSPF, EIGRP, and BGP.
Switching Protocols : VTP, STP, RSTP, MSTP, VLANs, PAgP, and LACP.
Network management : SNMP, CiscoWorks LMS, HP Openview, Solar winds, Ethereal.
Layer 3 Switching : CEF, Multi-Layer Switching, Ether Channel.
Carrier Technologies : MPLS, MPLS-VPN.
Redundancy protocols : HSRP, VRRP, GLBP.
Security Protocols : IKE, IPsec, SSL, AAA, Access-lists, prefix-lists.
Software : Microsoft Office Suite, MS SQL Server 2008, HTML.
COMERICA BANK, Auburn Hills, MI July 2015 to Present
Day-to-day work involves scheduling firewall policy provisioning and working with users to identify connectivity related issues and troubleshoot using both Smart Utilities and CLI.
Managing and administering Juniper SRX and Checkpoint Firewalls at various zones including DMZ, Extranet (Various Business Partners) and ASZ and internal.
Juniper Firewall Policy management using NSM and Screen OS CLI.
Troubleshooting Firewall Connectivity related issues using Smart view tracker on Checkpoint, NSM Log viewer for Juniper Firewalls.
Configure and administer Cisco ASA Firewalls (5585, 5550, and 5540) and use command line CLI, Cisco CSM, ASDM for day-to-day administration.
Active/Standby and Active/Active HA configuration on Cisco ASA Firewalls.
Configuring High Availability using Cluster XL on Checkpoint as well as VRRP and monitor the Sync status for stateful replication of traffic between active and standby member.
Configuring rules and maintaining Palo Alto firewalls and analysis of firewall logs using various tools.
Experience on ASA firewall upgrades to 9.x.
Configured Panorama web-based management for multiple firewalls.
Configuring rules and Maintaining Palo Alto Firewalls & Analysis of firewall logs using various tools.
Understand the flow of traffic through the Check Point Security gateway cluster and troubleshoot connectivity issues using advanced troubleshooting from Command Line Utilities.
Use Tools such as SKYBOX for Firewall Policy optimization and rule base Clean up.
Build and configure Active/Standby Failover on Cisco ASA with stateful replication.
Configure and tweak the inspection policies on Firewall to allow legacy application traffic.
Understand different types of NAT on Cisco ASA firewalls and apply them.
Firewall policy provisioning on Fortinet Fort iGATE appliances using FortiManager.
Support Blue Coat Proxy in explicit mode for users trying to access Internet from Corp Network.
Troubleshooting connectivity issues through Blue coat as well writing and editing web policies.
Administration Big IP F5 LTM for all Local Load balancing and use GTM for load balancing across Data Centers.
FWSM configurations in single/multiple context with routed and transparent modes.
Support Data Center Migration Project involving physical re-locations.
24 x7 on call support.
Pfizer, Chicago, IL July 2014 – June 2015 Network Engineer
Configuration and troubleshooting of Cisco Routers such as Cisco 3640, Cisco GSR 12416,21418(with PRP and RPR processors), Cisco catalyst 6509,7613 with supervisor cards
Involved in the configuration of the Nexus 2248 Fabric Extender (FEX) module on the Nexus 5000 to connect servers and storage devices.
Experience with Firewall Administration, Rule Analysis, Rule Modification
Experience working on different monitoring tools Q radar, Zenoss and Net scout to analyze and resolve the issues.
Configuring, Monitoring and Troubleshooting Cisco’s ASA 5500 security appliance. .
Worked with multiple customers over a period of time to enhance their network, resolve and do the RCA (root cause analysis) for in service production problems and create work around for known IOS issues.
Expertise in maintenance of layer2 switching tasks which advocate VLAN, VTP, STP, RSTP, PVST, RPVST, configuring of ether channel with LACP and PAGP along with troubleshooting of inter-VLAN routing.
Configured PVSTP+ for loop prevention and VTP for Inter-VLAN Routing.
Configured various Router interfaces like ATM interface, T3 interface, and Channelized T1 interfaces
Involved in IOS and CAT OS upgrade procedures and Pre/Post checks for customer production upgrades.
Experience working with NCM and Infoblox
Experience with Project data and voice documentation tools & experience with developing network design documentation and presentations using VISIO
Replaced old 6500 and WAN routers from DR testing site and Installed Nexus 7K and ASR 1006 routers.
Commissioning and decommissioning, configuring, URL and Web filtering, SSL Certificates, monitoring, SNMP traps, logging, blocking on Palo Alto devices, migrating from one network to other.
Installation and management of overall administration of LAN, WAN, systems involving design of network layouts, configuration and maintenance, Commissioning Routers & Switches, firewalls, IPS and ensuring maximum uptime during site deployment to VoIP..
Working on HP open view map for Network Management System and Ticketing
Configuration was running and completed in timely manner. Configure policies and enabled rules to alerting on intrusion events.
Responsible for entire LAN and WAN/WLAN maintenance and troubleshooting of the company network. Involved in the Team of Data Center Operations to perform duties like administration and deployment of Cisco Routers and Switches according to the organization requirements.
Configured FWSM on cisco 7600 router to reduce costs and operational complexity while enabling organization to manage multiple firewalls from the same management platform.
Provide solutions to Tier 1/2 escalated issues and tickets.
Implementation and configuration of F5 Big-IP LTM-6400 load balancers
Worked in projects converting P2P circuits into MPLS circuits, commissioning and decommissioning of the MPLS circuits for branch offices.
Configuring and resolving various OSPF issues in an OSPF multi area environment,
Implemented, configured BGP WAN routing, converting OSPF routes to BGP (OSPF in local routing).
Worked on commissioning and decommissioning of the MPLS circuits for various field offices & POPs.
GRE tunneling & Site-to Site VPN configuration between other two sites in USA.
Implemented redundancy for Routers, Switches and Firewalls.
SEI Investments, Oaks, PA Mar 2012 – June 2014
Configuring Static, IGRP, EIGRP, and OSPF Routing Protocols on Cisco 1600, 2600, 2800, 3600, 7300 series Routers.
Configured, installed software applications, anti-viruses, drivers and security software on user devices, maintained and troubleshoot desktop, laptop and peripheral equipment.
Perform hardware and software diagnostics, fault isolation and coordinate repairs and/or replacement of faulty equipment.
Maintain logs of network and bandwidth utilization of servers and network devices and create utilization report based on the logs
Design network and create physical and logical network layout diagrams
Write and maintain technical documents describing implemented technologies and architecture
Provided consultation services to clients for installing and configuring Cisco routers and switches
Configured Site-to-Site IPsec VPN tunnels to peer with different clients and each of client having different specifications of Phase 1 and Phase 2 policies using Cisco ASA 5500 series firewalls.
Configured VLAN’s, Private VLAN’s.
Configure various LAN switches such as CISCO CAT 2900, 3550, 4500, 6509 switches.
Configuring access layer switches such as Cisco 4510, 4948, 4507 switches for VLAN, Fast Ether Channel configuration.
Configured inside ACL and interfaces, outside ACL and interfaces.
Configured NAT and PAT policies.
Configuration and troubleshooting of EIGRP, OSPF, BGP.
Design OSPF areas for reliable Access Distribution and for Core IP Routing.
Extensively used TCP/IP tool like TELNET for remote login to the routers and SSH for secure login.
Has expertise in LAN/WAN technologies (fast Ethernet, Layer2 & 3 switched/routed LAN, and Frame Relay).
Unicorn Software and solutions, Dhaka, Bangladesh Oct 2010 – Feb 2012
Installation and Configuration of Cisco Catalyst switches 6500, 3750 & 3550 series and configured routing protocol OSPF, EIGRP, BGP with Access Control lists implemented as per Network Design Document and followed the change process as per IT policy It also includes the configuration of port channel between core switches and server distribution switches
Involved in the removal of EIGRP from all devices and making OSPF the primary routing protocol.
Designing and Implementation of (LAN) VLANs, VTP, Spanning Tree (STP), Trunking (dot1q and ISL) and Ether channel.
Key contributions include troubleshooting of complex LAN/WAN infrastructure that include routing protocols EIGRP, OSPF & BGP
Configured networks using routing protocols such as RIP, OSPF, BGP and manipulated routing updates using route-map, distribute list and administrative distance for on-demand Infrastructure
Worked on FTP, HTTP, DNS, DHCP servers in windows server-client environment with resource allocation to desired Virtual LANs of network
Responsible for day-to-day management of Cisco Devices, Traffic management and monitoring.
Implemented Hot Standby Router Protocol (HSRP) by tuning parameters like preemption.
Installation, Configuration and troubleshooting Cisco switches and Firewall on multi-mode context based environments.
Worked on FTP, HTTP, DNS, DHCP servers in windows server-client environment with resource allocation to desired Virtual LANs of network.
Configured Multiprotocol Label Switching (MPLS) VPN with Routing Information Protocol (RIP) on the customer’s Site
Participating in Test case design to suit Production Network scenarios
SSL Wireless, Dhaka, Bangladesh June 2008 – Sep 2010
Performed troubleshooting, while maintaining trouble ticket tracking, following internal/external escalation procedures and customer notifications.
Upgrading the network by translating protocol like EIGRP to OSPF.
Configured & Troubleshooting with BGP OSPF, EIGRP.
Configured MPLS VPNS for Customers
Configuring and troubleshooting with Cisco ASA(5550/5520), Juniper SRX(3600/650
Troubleshooting the network for the connectivity issues and network performance issues.
LAN / WAN installation, Configuration and support / IOS update (CISCO routers, Switches).
Configuration, Installation and maintain IP Phone.
Network connectivity troubleshooting, ping, tracert, telnet
Responsible for network documentation and daily, weekly and Monthly Reports.
CISCO Switch configuration in particular VLAN configuration / troubleshooting
Bachelor of Technology in Computer Science