Sathish Thangaraj
Bengaluru
Summary
Experienced and results-driven Network Engineer with expertise in designing, implementing, and troubleshooting complex network infrastructures. Adept in routing, switching, security, and network performance optimization across enterprise environments. Seeking a challenging role to leverage my technical skills and contribute to high-availability and scalable network solutions, while continuing to grow in areas like automation, SDN, and cloud networking.
Overview
10
10
years of professional experience
1
1
Certification
Work History
TECHNICAL CONSULTING ENGINEER
CISCO SYSTEMS
Bengaluru, India
08.2022 - Current
- Led firmware upgrades for Cisco campus and data center switches; configured ROMmon mode and EEM scripts for automation tasks.
- Deployed and supported switch stacking, SVL (dual/quad), and LAG setups (Static/Dynamic), including MLAG, VLT, and VRRP for high availability.
- Collaborated in bridge calls with Routing, security, firewall, and SD-WAN teams to troubleshoot cross-functional networking issues.
- Configured and maintained RSTP, RPVSTP, MSTP, static and default routing.
- Managed DHCP relay, named ACLs, and various port mirroring techniques (SPAN, RSPAN, ERSPAN) to analyze traffic behavior.
- Investigated and resolved packet drop issues using Wireshark; provided QoS bandwidth testing and documented RCAs with bug tracking when necessary.
- Implemented and supported VRF, route summarization, and access control policies.
- Worked on IGMP and DHCP snooping with dynamic ARP inspection for security and broadcast control.
- Managed modular and fixed-port switch stacks; handled hardware failure diagnostics including PoE/PoE+ and fiber module issues.
- Proficient in Iperf-based bandwidth analysis and reverse route configurations
TECHNICAL SUPPORT ENGINEER 2
DELL TECHNOLOGIES
Chennai, India
01.2021 - 08.2022
- Upgraded firmware on Dell campus and data center switches; configured ONIE and deployed third-party OS platforms (Dell OS10, Cumulus, Big Switch).
- Configured stacking for N-Series, S-Series, PowerConnect, and Force10 switches; managed both modular and fixed-port stacks.
- Experienced in Dell Networking OS6, OS9, and OS10; collaborated with Dell server teams during bridge calls and performed basic VMware network setups and ESXi deployments on MX Chassis, FX2, and VxRail servers.
- Created and managed LAG (static/dynamic), MLAG, VLT, and VRRP configurations; implemented and maintained RSTP, RPVSTP, MSTP, and routing (static, default static).
- Integrated dot1x and RADIUS authentication between Dell switches and Windows servers; configured DHCP relay, named ACLs, and SPAN/RSPAN for traffic analysis.
- Troubleshoot packet drop issues and VRRP behavior; configured OSPF (single and multi-area) with Type 3 and Type 5 LSA filtering.
- Deployed iBGP and basic eBGP, including VRF, route summarization, VLANs, and access control.
TECHNICAL SUPPORT ENGINEER
ZOHO CORPORATION
Chennai, India
03.2020 - 12.2020
- Configured and managed OpManager and ManageEngine Desktop Central for centralized endpoint monitoring and management.
- Performed basic network configurations on Dell and Aruba switches using OpManager; utilized Syslog, SNMP, and NetFlow for network monitoring and diagnostics.
- Designed and deployed SOM modules and remote office setups as per client requirements.
- Integrated Active Directory with Desktop Central for remote agent deployment using GPO, IP range, and manual methods; created distribution servers for each remote site.
- Implemented failover servers and successfully migrated the PostgreSQL database to MS SQL Server for enhanced performance and scalability.
- Managed patch deployments across Windows, Linux, and macOS environments to ensure security compliance.
ENGINEER – SWITCHING
CSS CORP
Chennai, India
12.2017 - 03.2020
- Configured and managed Aruba and HPE switches, addressing basic networking issues and handling port mirroring for traffic analysis.
- Performed firmware upgrades and managed VLANs, including inter-VLAN routing, static routes, and reverse routing.
- Deployed and maintained modular stacking and Virtual Switching Framework (VSF) for high availability.
- Monitored and analyzed hardware failures in Aruba switches and access points; provided RCA for issues with PoE/PoE+, fiber modules, and fixed-port switches.
- Configured AAA authentication on Aruba switches for secure access.
- Utilized Wireshark for deep packet inspection and troubleshooting of drop and STP-related issues.
- Implemented port security and DHCP services within VLANs as per client requirements.
- Worked and troubleshoots Dynamic routing protocols
ENGINEER – TECHNICAL SUPPORT
CADD CENTRE TRAINING SERVICES PRIVATE LIMITED
Chennai, India
06.2016 - 12.2017
- Worked as Technical trainer
- Product trained: CCNA, CCNP, MCSA, MCSE, RHCSA, RHCE, AWS, CEH
Education
M.E - Computer Science and Engineering
Sree Sowdambika College of Engineering, Anna University
Chennai, India01-2015
M.Sc - Software Engineering
Kamaraj College of Engineering And Technology, Anna University
Chennai, India01-2012
Skills
- Technologies yet to learn: Python, Ansible NETCONF, RESTCONF
- Tools: IPERF, IXIA (Basic), Wireshark
- Bugs found during TAC troubleshooting: SYSLOG, NAT in L3 switches, REP convergence, Mpls egress netflow, OSPF Mtu bug, STP hardware blocking due to VTP pruning, LACP between cisco and aruba switch, Bandwidth issue on line card module
- Network engineering
- Customer support
- IT infrastructure design
- Training and mentoring
- Teamwork and collaboration
- Problem-solving
- Time management
- Multitasking
- Excellent communication
- Reliability
- Network support
- Self motivation
Certification
Certification Completed: CCIE, MCSE, RHCSA, Azure, AWS, Vmware VCTA
DISCLAIMER
I hereby declare that the information furnished above is correct and true to the best of my knowledge.
PERSONAL DETAILS
- Nationality: Indian
- Marital Status: Married
Timeline
TECHNICAL CONSULTING ENGINEER
CISCO SYSTEMS
08.2022 - Current
TECHNICAL SUPPORT ENGINEER 2
DELL TECHNOLOGIES
01.2021 - 08.2022
TECHNICAL SUPPORT ENGINEER
ZOHO CORPORATION
03.2020 - 12.2020
ENGINEER – SWITCHING
CSS CORP
12.2017 - 03.2020
ENGINEER – TECHNICAL SUPPORT
CADD CENTRE TRAINING SERVICES PRIVATE LIMITED
06.2016 - 12.2017
M.Sc - Software Engineering
Kamaraj College of Engineering And Technology, Anna University
M.E - Computer Science and Engineering
Sree Sowdambika College of Engineering, Anna University