E BALARAM PATRA

Senior Network Security Engineer | Client: T-Mobile

• Executed complex hardware migrations including full chassis swaps for End-of-Support (EOS) Cisco Nexus switches, ensuring zero un-planned downtime for T-Mobile's critical network infrastructure.
• Orchestrated large-scale OS upgrades across enterprise-grade Cisco Nexus (NX-OS) and Cisco Carrier Routing System (IOS-XR) devices to mitigate security vulnerabilities and improve system stability.
• Managed technical maintenance windows for high-availability telecom environments, coordinating risky hardware and software changes with minimal disruption to subscriber services.

• Validated post-change network integrity and performance baselines following infrastructure upgrades, adhering strictly to T-Mobile's stringent security and compliance standards.
• Mitigated network layer risks by identifying, testing, and patching known exploits within Cisco network operating systems.
• Authored comprehensive technical runbook , fallback plans, and change management documentation to ensure seamless operational continuity during infrastructure lifecycles.
• Developed and implemented project plans, ensuring alignment with client objectives and timelines.
• Conducted comprehensive technical analyses to optimize system performance and reliability.
• Mentored junior engineers, fostering skill development and enhancing team productivity.
• Streamlined workflows through process improvements, enhancing overall efficiency in project delivery.

• Used to add policies in firewall (Checkpoint , FortiGate & Palo Alto) & rule set in McAfee/Sky High Security Proxies.
• Used to Manage all LTM F5 activities such as exposing of url or configuring reverse proxy etc.
• Troubleshoot BGP connectivity issues, OSPF issues, network routers and switches to isolate the trouble and take appropriate action to resolve.
• Power failures, circuits down alarms and other performance parameters that may affect the network's health.
• Configuring & Troubleshooting Ethernet channel and MAC Bypassing, STP, HSRP issues.
• Firewall & F5 Load balancer Administration (Checkpoint Using R80.20 Smart Console & Smart Dashboard).
• Maintaining High Availability and diversified firewall environments for customers using Check Point High Availability & Palo alto HA.
• Performed Day to day Health Check on firewalls & F5 Load Balancers such as CPU Utilization, Memory Utilization, Disk Utilization & HA Status on all firewalls & Policy push for Checkpoint firewalls & its Gateways.

• Monitoring all the networking devices used in Volvo Infrastructure, Worked on different incidents on networking issue, juniper firewalls, Logged into devices checked interfaces & live traffic things & worked on Riverbed wan optimizers.
• Supporting MIP in case of Major incident Network issues.

• Maintained and troubleshot network infrastructure containing 300 nodes across 30 departments.
• Configured and troubleshot Cisco switches and routers, including 4000 series, Catalyst 2950, 2960, GE2000, SF300, and 1751V & 3660M routers, with basic knowledge of Cyberoam Firewall (CR 100iA).
• Worked with routing protocols such as RIP, IGRP, EIGRP, OSPF, and implemented dual ring topology for network redundancy.