Srujan Kumar
Raleigh,USA
Summary
Senior Network and Network Security Engineer with 8+ years of experience supporting large-scale enterprise and data-center environments. Strong expertise in Cisco routing and switching, network security platforms, VPN technologies, and high-availability architectures. Proven Tier-III engineer with a solid track record of troubleshooting complex production issues, leading incident resolution, and performing network upgrades and migrations. Extensive experience working with firewall platforms, IDS/IPS, traffic analysis, and packet captures to diagnose and resolve performance, connectivity, and security issues. Hands-on experience managing 24x7 production environments, supporting critical business applications, and minimizing downtime through proactive monitoring and structured troubleshooting. Well-versed in change management processes, maintenance window planning, and rollback strategies to ensure risk-free implementations. Demonstrated ability to perform root cause analysis, produce clear documentation, and implement long-term corrective actions. Strong collaborator who works effectively with application, server, security, cloud, and infrastructure teams to deliver secure, reliable, and high-performing network solutions in SLA-driven environments.
Overview
8
8
years of professional experience
Work History
Sr Network Engineer
CVS Pharmacy
Raleigh, NC
02.2024 - Current
- Provide Tier-III network and network security support for large-scale enterprise and data-center environments supporting critical business applications
- Support and troubleshoot firewall platforms including Check Point, Fortinet, Juniper SRX, and Cisco ASA, handling NAT, security policies, zones, and VPN connectivity
- Manage incidents across firewalls, routers, switches, and IDS/IPS platforms with full ownership through resolution within SLA requirements
- Perform firewall and network upgrades including Check Point R77, R80, and R81, FortiOS, and Junos OS with validation and rollback planning
- Troubleshoot complex connectivity, performance, and security issues using logs, packet captures, tcpdump, and monitoring tools
- Support high-availability environments including failover testing, redundancy validation, and hardware RMA replacements
- Execute network changes following change management and CAB processes including impact analysis, implementation, and post-change verification
- Work closely with application, server, proxy, F5, and security teams to analyze traffic flow and restore production services
- Perform root cause analysis for major incidents and document findings with corrective and preventive actions
- Monitor network health, CPU, memory, bandwidth, and VPN utilization to ensure stability and performance
- Onboard network and security devices into monitoring platforms using SNMP and syslog configurations
- Coordinate with vendors and TAC during priority incidents and escalations to drive timely resolution
- Maintain accurate network documentation, procedures, and operational runbooks to support ongoing operations
Sr Network Engineer
Envestnet Inc
Raleigh, NC
06.2023 - 02.2024
- Provided senior-level support for enterprise LAN, WAN, and data-center network environments.
- Configured Cisco routing and switching infrastructure, including OSPF, EIGRP, BGP, VLANs, and inter-VLAN routing.
- Administered firewall platforms such as Check Point, Fortinet, Juniper SRX, and Cisco ASA.
- Implemented NAT, security policies, zones, and Site-to-Site VPN connectivity.
- Supported Nexus switching environments through NX-OS configuration, upgrades, and validation.
- Troubleshot complex connectivity and performance issues using packet captures and monitoring tools.
- Collaborated with application, server, security, and infrastructure teams to resolve production incidents.
- Maintained up-to-date network documentation and operational procedures.
Sr Network Engineer
Comcast Corporation
Philadelphia, PA
09.2020 - 06.2023
- Provided senior-level support for enterprise and data-center network environments.
- Designed and configured Cisco routing and switching infrastructure, utilizing OSPF, EIGRP, BGP, VLANs.
- Administered and troubleshot Cisco ASA and Check Point firewalls, managing NAT, security policies, VPN connectivity.
- Supported Cisco Nexus switching environments with NX-OS configuration, upgrades, and validation efforts.
- Led network migrations and hardware refresh initiatives with minimal production impact.
- Troubleshot connectivity, latency, and packet loss issues using packet captures and monitoring tools.
- Delivered Tier-III escalation support during major outages and high-severity incidents.
- Collaborated with cross-functional teams to ensure end-to-end network reliability.
Sr Network Engineer
Wells Fargo
SFO, CA
07.2020 - 08.2020
- Provided senior-level support for enterprise and data-center networks during transition engagement.
- Supported Cisco routing and switching infrastructure including OSPF, EIGRP, and BGP protocols.
- Administered and troubleshot Cisco ASA and Check Point firewall platforms for security management.
- Assisted with Nexus switching environments, focusing on NX-OS configuration and validation.
- Managed F5 LTM load balancers to ensure application availability and efficient traffic distribution.
- Analyzed network connectivity and performance issues using logs and packet captures.
- Participated in maintenance activities and implemented changes to enhance system stability.
- Collaborated with infrastructure, security, and application teams to restore service stability.
Network Engineer
Hilton Corporation
Memphis, TN
07.2018 - 06.2020
- Supported enterprise LAN, WAN, and data center network infrastructure across multiple locations.
- Configured Cisco routing and switching environments for OSPF, EIGRP, BGP, VLANs, and inter-VLAN routing.
- Administered Cisco ASA and Check Point firewalls, managing NAT, access policies, and VPN connectivity.
- Monitored network performance and availability through SNMP-based tools and logs.
- Troubleshot network connectivity and security issues utilizing packet captures and diagnostic tools.
- Participated in network upgrades, including IOS/NX-OS updates and hardware replacements.
- Collaborated with application, server, and infrastructure teams to resolve production incidents.
- Maintained comprehensive network documentation, diagrams, and configuration records.
Network Engineer
IT WorkForce Inc
Chicago, IL
09.2017 - 07.2018
- Supported enterprise LAN, WAN, and data center networks utilizing Cisco routing and switching technologies.
- Configured and maintained routing protocols such as OSPF, EIGRP, BGP, and static routing.
- Implemented VLANs, trunking, STP, and inter-VLAN routing on Cisco Catalyst switches.
- Administered firewall platforms including Cisco ASA and Check Point firewalls to enhance security.
- Configured NAT, access control policies, and basic VPN connectivity for secure network access.
- Executed network monitoring and troubleshooting using Wireshark, SNMP, and syslog tools.
- Assisted with network upgrades, IOS updates, and hardware replacements during scheduled maintenance.
- Maintained comprehensive network documentation and diagrams to ensure operational readiness.
Education
Master of Science - computer science
Governor's State University
University Park, IL05.2017
Skills
Networking & Routing
TCP/IP, IPv4/IPv6, OSPF, BGP, EIGRP, RIP, IS-IS, Route Redistribution, PBR, Static Routing
Switching & LAN
VLANs, 8021Q, STP/RSTP/MST, VTP, HSRP, GLBP, VRRP, EtherChannel, VPC, Port Security
Firewalls & Security
Check Point (R77–R81), Fortinet FortiGate, Juniper SRX, Cisco ASA, Palo Alto, NAT, Security Policies, Zones, Anti-Spoofing
VPN
IPSec VPN, SSL VPN, Site-to-Site VPN, Remote Access VPN
Data Center & HA
Cisco Nexus (NX-OS), ASR, Catalyst, F5 LTM, High Availability, Failover
IDS / IPS
HP Tipping Point, McAfee IPS, Cisco IDS
Monitoring & Tools
Splunk, FireMon, Wireshark, tcpdump, SolarWinds, SNMP, Syslog
Network Management
Cisco Prime, ASDM, Check Point SmartConsole, Provider-1, FortiManager, FortiAnalyzer, Juniper NSM
LAN / WAN
Ethernet, MPLS, Frame Relay, PPP, HDLC, T1/T3, Fiber, Copper
Operating Systems & Scripting
Linux, UNIX, Windows Server, Python (basic), Bash/Shell
Timeline
Sr Network Engineer
CVS Pharmacy
02.2024 - Current
Sr Network Engineer
Envestnet Inc
06.2023 - 02.2024
Sr Network Engineer
Comcast Corporation
09.2020 - 06.2023
Sr Network Engineer
Wells Fargo
07.2020 - 08.2020
Network Engineer
Hilton Corporation
07.2018 - 06.2020
Network Engineer
IT WorkForce Inc
09.2017 - 07.2018
Master of Science - computer science
Governor's State University