Summary
Overview
Work History
Education
Skills
Timeline
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Parthiban Loganathan

Senior Network Engineer
Phoenix,AZ

Summary

9+ years of experience in networking, including hands-on expertise in providing network support, troubleshooting, and analysis for a broad range of LAN/WAN/MAN communication systems in data centers, hub sites, and remote locations. Proficient in Cisco IOS and Arista for configuring and troubleshooting routing protocols: OSPF, EIGRP, RIP, and BGP v4. Experienced in installing and troubleshooting network and security infrastructure on routers and switches (L2/L3) from various vendors.

Offering solid understanding of IT fundamentals and passion for technology, well-suited for technical role with growth potential. Brings foundational knowledge in networking and system administration, capable of picking up new skills quickly. Ready to use and develop technical troubleshooting and hardware configuration abilities in Network Engineer role.

Overview

9
9
years of professional experience
2015
2015
years of post-secondary education

Work History

Senior Infrastructure Engineer

American Express
11.2022 - Current
  • Responsible for configuration and design based on business requirements
  • Led migration from Cisco ACI to Cisco standalone leaf and spine design
  • Designed and implemented migration from OSPF to a full-mesh BGP setup through firewalls
  • Spearheaded the migration of legacy Cisco hardware to Arista switches
  • Provided escalation support and collaborated with operations and internal teams for issue resolution
  • Built new leaf and spine fabric to enhance network scalability and performance
  • Coordinated with various teams to gather requirements and fulfill business network needs
  • Replaced border leaf switches in a VXLAN fabric environment
  • Managed and executed upgrades for Cisco Nexus switches
  • Decommissioned legacy Cisco 5K switches

Senior Network Engineer

Fusion Global Solutions
12.2020 - 11.2022
  • Configured AWS Direct Connect and onboarded traffic to AWS Cloud.
  • Collaborated with multiple teams to migrate traffic from on-premises to AWS Cloud.
  • Managed and maintained the company’s network infrastructure, troubleshooting issues as they arose.
  • Deployed new firewalls through Panorama and configured them per business requirements.
  • Maintained and troubleshot both WAN and LAN environments.
  • Led the onboarding of Imperva for DDoS protection.
  • Led various on-premises and cloud projects, including AWS Direct Connect, DIA circuits, BGP configurations, and building tunnels to Imperva.

Network Operations Engineer

American Express
11.2015 - 10.2020
  • Provided end-to-end technical support for all network platforms in the Global Network Operations Center (GNOC)
  • Delivered hands-on technical support, analysis, and troubleshooting for infrastructure and network services
  • Deployed and optimized monitoring platforms to improve network stability and availability
  • Managed incident resolution across all severity levels, collaborating with infrastructure and application teams
  • Monitored network devices and troubleshot alarms using tools such as SolarWinds and Splunk
  • Configured and maintained F5 BIG-IP LTM (virtual servers, pools, SNATs, health monitors, iRules)
  • Optimized BGP routing using attributes such as Weight, Local Preference, MED, and AS-Path
  • Coordinated with vendors to perform root cause analysis (RCA) and replace faulty hardware
  • Created and maintained documentation for RMA and failover procedures
  • Configured VLANs, routing, and NAT on customer edge routers and switches
  • Troubleshot and resolved issues with TCP/IP, UDP, IEEE 802.3, and multilayer switching protocols
  • Managed and supported Cisco 4500 and 3850 access switches
  • Analyzed packet captures using Wireshark to diagnose network issues
  • Managed LAN protocols such as STP, RSTP, MST, VTP, VLAN, and port channel protocols (LACP, PAgP)
  • Ensured high availability using redundancy protocols like HSRP, VRRP, and GLBP
  • Coordinated with vendors and service providers for hardware replacements and issue resolution

Education

Master’s -

In Information Technology and Computing

Skills

Networking Platforms:

  • Cisco Nexus (9K, 7K, 5K, 2K, 1K)

  • Cisco Catalyst (6500, 4900, 3750, 3500, 4500, 2900 series)

  • Arista (7010-T, 7280, 7150S)

Routing & Switching:

  • OSPF, EIGRP, RIP, BGP (Weight, Local Preference, MED, AS-Path)

  • VLAN, VXLAN, STP, RSTP, VTP

  • LACP, PAgP, Port-Channel

Security & VPN:

  • Cisco ASA, Palo Alto

  • IPsec, SSL-VPN

Data Center Operations:

  • Leaf-Spine Fabric Design

  • High Availability (HSRP, VRRP, GLBP)

  • Network Redundancy and Failover

Load Balancing:

  • F5 BIG-IP (LTM, GTM)

  • iRules, SNAT, Virtual Servers

Cloud & Virtualization:

  • AWS

  • VMware

Monitoring & Troubleshooting:

  • Wireshark

  • SolarWinds

  • Splunk

  • ThousandEyes

  • Spectrum

  • AKIPS

Network Automation:

  • Python

Protocols & Standards:

  • TCP/IP, UDP, IEEE 8023

  • MPLS, BGP, IPsec

Documentation & Reporting:

  • Network Diagrams

  • Standard Operating Procedures (SOPs)

  • RCA (Root Cause Analysis) Reports

Timeline

Senior Infrastructure Engineer

American Express
11.2022 - Current

Senior Network Engineer

Fusion Global Solutions
12.2020 - 11.2022

Network Operations Engineer

American Express
11.2015 - 10.2020

Master’s -

In Information Technology and Computing

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Parthiban LoganathanSenior Network Engineer