• Played a principle role in configuring and implementing composite Network models consisting of Cisco 7300, 4000, 3800, ASR 9000 series routers and Cisco catalyst 3850, 3560, 4500, 6500 series switches• Worked with cisco ASA5545 and ASA 5585-SSP20,NetScreen ISG 1000 and ISG2000 and JUNIPER SRX650,SRX3600,SRX1400 firewalls • Managed RTP, RTSP, FTP, DNS, HTTP, DHCP Application Level Gateways, services and servers whenever needed• Implemented Virtual Router Redundancy Protocol (VRRP) by tuning priority levels, preemption, Authentication and object tracking• Acquitted with Cisco Meraki for Cisco Wireless devices• Monitoring, managing and troubleshooting Cisco Wireless devices using Cisco Meraki• Participated in the installation, configuration, and post installation routine operational tasks and configuration of the Cisco Nexus Switches• Designed integrated 10 gigabit networks using Cisco Nexus 7k series switches and Cisco 6500, 3800 series routers improving performance of existing network• Monitored, Managed and hardened security policies and rules on checkpoint NGX firewalls• Maintained and Supported Multiprotocol Label Switching (MPLS) on WAN network • DNS, DHCP & IPAM (DDI) protocols and security• Implemented and upgraded Networks using OSPF and BGP based routing protocols and prepared flow charts and utilization monitoring reports • Worked with Cisco ASA 5500-X with Firepower services, Firepower 4100 and Palo-alto Next-Gen PA-5000 Firewalls implementing and managing NAT, IPsec, site-to-site and remote VPNs, advanced inspection, anti-spoofing and AAA policies• Provided assistance in redundancy mechanisms for multi homed Border Gateway Protocol (BGP) network by tuning AS-path for various network segments• Improved Quality of Service (QoS) by defining LSPs on MPLS to meet specific service level agreements (SLAs) on traffic latency, jitter, packet loss and downtime• Performed Load balancing using F5 BIG-IP LTM ADC 6400, Cisco ACE 4710 Load balancers

• Worked, managed and maintained LAN networks, VLANs and database, Port Security on Nortel 5510, 5520; Cisco Catalyst 3850, 4500 and 6500 switches and implemented VDC, VPC, and OTV on Nexus 5k and 7k switches • Played an important role in a team by implementing and documenting Switching Topologies, VLAN management, Port security, Trucking protocols, STP configuration, Inter-VLAN routing, 802.1x port-based authentication, LAN security and preparing Microsoft Visio reports and designs• Ensured availability and integrity of Network, System and Data through preventive maintenance and upgrade plans and implementations• Monitored network and provided analysis, improvement scopes and support using various monitoring tools such as Wireshark, SolarWinds Performance Monitor and coordinated with off-shore support teams to ensure flawless operations• Responsible for deployment, Integration and Troubleshoot Cisco Core Routers ( ASR-9922,9912,9010,1006,1002,& 901).• Configured and troubleshot OSPF, BGP, VRRP, Static routes on cisco 2900, 3800, 4000 Routers• Contributed in implementation and configuration of F5 BIG-IP LTM-6400 load balancers, redistribution into OSPF on the core ASA firewall• Configured IP addressing scheme and coordinated with LAN/WAN engineers to develop and implement various security policies • Supported OSPF and BGP powered network by resolving Tier 3 and Tier 4 tickets for internal teams & external clients of all locations• Coordinated with a team to upgrade network by changing primary routing protocol to OSPF from EIGRP and Participated in the modification of BGP from multiple MPLS powered routers• Installed, configured and managed DNS and DHCP server, and Active Directory database

• Worked, managed and maintained LAN networks, VLANs and database, Port Security on Nortel 5510, 5520; Cisco Catalyst 3850, 4500 and 6500 switches and implemented VDC, VPC, and OTV on Nexus 5k and 7k switches. • Played an important role in a team by implementing and documenting Switching Topologies, VLAN management, Port security, Trucking protocols, STP configuration, Inter-VLAN routing, 802.1x port-based authentication, LAN security and preparing Microsoft Visio reports and designs.• Ensured availability and integrity of Network, System and Data through preventive maintenance and upgrade plans and implementations.• Monitored network and provided analysis, improvement scopes and support using various monitoring tools such as Wireshark, Performance Monitor and coordinated with offshore support teams to ensure flawless operations.• Experience Domain Name System/Dynamic Host Configuration Protocol/IP Access Management (DNS/DHCP/IPAM) appliances. • SolarWinds monitoring & helpdesk platform.• Responsible for deployment, Integration and Troubleshoot Cisco Core Routers (ASR-9922,9912,9010,1006,1004,1002,903, 920_i, 920_0 & 901).• Configured and troubleshot OSPF, BGP, VRRP, Static routes on cisco 2900, 3800, 4000 Routers.• Contributed in implementation and configuration of F5 BIG-IP LTM-6400 load balancers, redistribution into OSPF on the core ASA firewall.

• Planning & automation of functional & performance tests of BGP, OSPF, MARO, SNMP, XML, QoS, System Failure Recovery & Ethernet customer facing features.• Maintained Checkpoint security policies including NAT, VPN, and Secure Remote access, Configured IPSEC VPN (Site-Site to Remote Access) on SRX series firewalls.• Configuring, Monitoring, troubleshooting Cisco Wireless Access points and Wireless controllers using Cisco Meraki’s user interface.• Developing the scripts using Spirent iTest tool• Verification & Validation of the test cases in-line with specification to test functionality.• Testing the Tomahawk 100GE line cards facing towards CE• Involved in BGP & OSPF scaling• Router upgradations when required • Keep team members and managers informed of key developments, program decisions, issues, and changes to the project and the project plan.• Interact directly with line managers to ensure resources are available when needed, and to negotiate amendments to the project plan especially those that change deliverable completion dates.• Testing and verification of products compliant to latest version test plans and AT&T specifications.• Follow configuration management, defect reporting, tracking tools and defect management practices of AT&T.

• Security infrastructure engineering and worked on various platforms such as Microsoft Windows, UNIX, Juniper firewalls, Palo Alto firewalls, Bluecoat Proxies, Juniper Intrusion Prevention devices, and wireless switch security management to maintain the network infrastructure.• Administered and evaluated firewall access control requests to ensure that requests are compliant with client's security standards and policies.• Configurated and supported of Juniper Net screen firewalls and Palo Alto firewalls.• Created and analyzed reports on firewall logs and made required changes.• Configured Juniper Net Screen Firewall Policies between secure zones using Network Security Manager (NSM).• Consulted in Palo Alto design and installation for Application, URL filtering, Threat Prevention and Data Filtering.• Maintained and updated Active Directory database for authentication and deployment purposes.• Worked on Nexus platform 7k series, 5K series (5548, 5020 and 5010), 2248 and successfully implemented VSS on the Cisco catalyst switches for a client.• Learned and developed skills in working and planning migration to Check Point and Palo Alto next-generation firewalls from existing legacy firewalls.• Managed successful delivery of massive security response portfolio including Splunk and Cisco ISE.• Worked primarily as a part of the security team and daily tasks included firewall rule analysis, rule modification, and administration.