Network Engineer Change Management

Kasula Punnaiah Network Engineer

FL, USA +1-813-***-**** *************@*****.*** LinkedIn

SUMMARY

Network Engineer with over 4 years of experience in designing, implementing, and maintaining secure, high-performance enterprise networks across global infrastructures. Proficient in routing and switching protocols such as BGP, OSPF, and EIGRP, firewall configurations including Cisco ASA, Palo Alto, and Fortinet, and network optimization through QoS and traffic shaping. Skilled in cloud networking with AWS and Azure, SD-WAN, and network automation using Python, Ansible, and Git. Proven track record in reducing latency, improving availability, and strengthening security through proactive diagnostics and structured change management. Experienced with tools like Wireshark, SolarWinds, and ServiceNow.

SKILLS

Network Technologies: Cisco Routers, Cisco Switches, Cisco Nexus, Juniper SRX, Fortinet Firewalls, Palo Alto Firewalls, Cisco ASA, Cisco Wireless Controllers, Aruba Access Points, F5 Load Balancer Routing & Switching Protocols: BGP, OSPF, EIGRP, Route Redistribution, Static Routing, VLANs, Trunking, EtherChannel, STP, RSTP, MSTP, HSRP, VRRP, GLBP

Network Security: Firewall Rule Management, ACLs, NAT, PAT, IPsec VPN, SSL VPN, DMVPN, Remote Access VPN, DHCP Snooping, Port Security, ARP Inspection, 802.1X

Cloud & Hybrid Networking: AWS VPC, Subnets, Route Tables, NAT Gateway, Security Groups, VPN Gateway, Azure Virtual Networks, Site-to-Site VPN, BGP Peering

Diagnostics & Monitoring: Wireshark, SolarWinds, PRTG, SNMP, Syslog, NetFlow, Cisco DNA Center, Nmap Automation & Scripting: Python, Netmiko, Ansible, Bash, Log Collection Scripts, Git, YAML, JSON Infrastructure & Optimization: LAN Design, WAN Design, IPv4 Subnetting, IPv6 Subnetting, Cabling Standards, Patch Panel, High Availability, QoS, Bandwidth Management

Virtualization & SDN: SD-WAN, Cisco Meraki, Fortinet SD-WAN, Cisco ACI, VMware Networking, vSwitch, VMkernel Documentation & IT Operations: Network Diagrams, Visio, Lucidchart, Change Management, ServiceNow, Jira, RCA, ITIL

EXPERIENCE

Network Engineer UnitedHealth Group FL, USA Aug 2024 – Present

Monitored over 500 network devices across enterprise branches, achieving 99.98% system availability through timely maintenance and troubleshooting of routing, switching, and firewall systems.

Reconfigured inter-branch routing with BGP and OSPF, reducing latency by 18% and improving real-time communication efficiency across the internal corporate WAN infrastructure.

Investigated bandwidth spikes and recurring packet drops, identifying root causes and applying QoS traffic shaping policies that enhanced network throughput for 3,000+ employees.

Executed scheduled firmware updates across Cisco switches and Fortinet firewalls, preventing vulnerabilities and maintaining compliance with enterprise security policies.

Deployed access control modifications on edge firewalls, enhancing segmentation and reducing unauthorized access incidents across internal segments by 25% within six months.

Maintained detailed records of all configuration changes using ServiceNow, reducing mean time to resolution during repeat issues by 22% and improving team-wide operational awareness.

Network Engineer Intern UnitedHealth Group FL, USA Dec 2023 – May 2024

Supported migration of 40+ Cisco Catalyst switches to a centralized system, streamlining monitoring and reducing manual intervention time by 30% through better visibility.

Configured VLANs and trunk ports in sandbox environments, replicating production scenarios to understand traffic flow and access control mechanisms across isolated subnetworks.

Used PRTG and SNMP tools to generate weekly anomaly reports, contributing to early detection of 12 priority-level incidents and enhancing proactive response capabilities.

Assisted with firewall policy updates on Cisco ASA, improving segmentation by isolating public and employee zones in accordance with enterprise standards.

Participated in hardware inventory and cabling audits, improving tracking accuracy by 35% and assisting with compliance readiness for semi-annual infrastructure reviews.

Documented all tasks using ServiceNow, achieving a 92% on-time resolution rate for assigned issues while supporting multiple network support teams.

Network Engineer Hexaware Technologies India Jan 2020 – Aug 2022

Managed WAN and LAN configurations for client offices across three countries, lowering network latency by 20% through optimized static and dynamic route design.

Coordinated software and firmware updates across Cisco routers and Fortinet firewalls, avoiding downtime and ensuring connectivity for over 1,200 users.

Planned and implemented IPv4 subnetting schemes for new branches, integrating into global infrastructure with zero post-deployment conflicts or routing issues.

Monitored bandwidth via NetFlow and system logs, generating reports that informed procurement decisions and supported long-term network scalability.

Executed diagnostic tasks during major incidents, reducing resolution time - under 30 minutes using CLI-based troubleshooting & path tracing.

Conducted quarterly health checks of edge devices, flagging bottlenecks and recommending upgrades to support growing traffic loads. Network Administrator Intern Hexaware Technologies India Jul 2019 – Dec 2019

Helped configure routers and switches during lab simulations, building foundational skills for managing enterprise network infrastructure in deployment scenarios.

Tracked hardware and software lifecycles for 300+ devices, maintaining accurate inventory to support audits and upgrade planning.

Performed basic diagnostics using CLI tools, contributing to faster resolution of user complaints related to access layer disconnections.

Participated in firewall patch rollouts on Fortinet & ASA, gaining experience with version control, rollback planning, and post-update validation.

Contributed to network performance tests by capturing pre- and post-change statistics to assess impact of topology adjustments.

Updated and verified topology diagrams and asset records, improving documentation accuracy by 40% and supporting efficient troubleshooting.

EDUCATION

Master of Computer Science Saint Leo University Florida, US May 2024 Bachelor of Technology Sreyas Institute of Engineering & Technology, Telangana Inidia Sep 2021

CERTIFICATIONS

Cisco Certified Network Associate

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