Summary
Overview
Work History
Education
Skills
Websites
Certification
Networking Knowledge
Timeline
Generic

RAJENDRA KUMAR RANWA

Gurgoan

Summary

Accomplished Network Security Engineer with a track record at GIESECKE & DEVRIENT in deploying FortiGate firewalls and establishing robust security frameworks. Expertise in diagnosing and resolving advanced network problems while leveraging SD-WAN technology for performance improvement. Demonstrated success in collaboration and customer engagement in high-pressure situations.

Overview

3
3
years of professional experience
1
1
Certification

Work History

Network Administrator

Giesecke and Devrient
Gurugram
08.2025 - Current
  • Configure and maintain FortiGate firewalls, Cisco switches, Cisco wireless controllers, Cisco access points, and Aruba access points.

  • Configured and maintained network devices for secure connectivity.
  • Troubleshot connectivity issues to ensure operational efficiency.
  • Assisted in designing network architecture for new projects.
  • Provided technical support to users for network-related problems.
  • Documented network configurations and changes for reference.
  • Collaborated with teams to improve system uptime and reliability.
  • Performed routine troubleshooting and network monitoring.
  • Configured and maintained routers, switches, firewalls, wireless networks and other network devices.
  • Implemented security measures such as firewalls, encryption technologies and access control lists to protect data from unauthorized access.
  • Handled network configurations after hours and on weekends to alleviate downtime and maintain smooth operations.
  • Participated in on-call shifts for holidays and weekends in case of system or network-related emergencies.
  • Analyzed network traffic patterns to identify potential problems or areas for improvement.
  • Diagnosed network issues using tools such as packet sniffers and protocol analyzers.
  • Monitored network traffic for potential threats and vulnerabilities.
  • Configured firewalls and intrusion detection systems to enhance security measures.
  • Configured and maintained firewall rules for network security compliance.
  • Provided technical support for firewall-related inquiries and issues resolution.
  • Developed documentation for firewall configurations and standard operating procedures.
  • Analyzed log files from firewalls, intrusion detection systems, and other security devices.
  • Developed scripts to automate firewall rule changes.
  • Replaced faulty or damaged network hardware components to improve performance.
  • Managed wireless networking setups, including access points placement and security configurations, to ensure robust mobile connectivity.
  • Managed IP addressing and subnetting, ensuring efficient network operation and connectivity.

Network Security Engineer

ALETHE CONSULTING PVT.LTD
Gurgoan
12.2023 - 07.2025
  • Configuration, maintenance, upgrades, and troubleshooting of FortiGate Firewalls.
  • Configure firewall rules, policies, objects, traffic shapers, and provide access to users as per user requirements.
  • Conducted regular vulnerability assessments, and implemented appropriate security measures.
  • Configuring troubleshooting for antivirus, web filter, file filter, application control, and SSL inspection.
  • Configuring and Troubleshooting Load Balancing Based on Software-Defined WAN (SDWAN) on FortiGate.
  • Configure IPsec, ADVPN, and SSL VPN in Fortinet.
  • Collaborated with cross-functional teams to ensure security policies and procedures.
  • Troubleshooting performance issues related to the FortiGate firewall, such as CPU, memory, and session.
  • Also deals with SD-WAN network-related issues, such as packet loss, latency, and jitter.
  • Support enterprise customers to build up the secure network infrastructure with the latest SD-WAN technology.
  • Configuring traffic shaping to enhance the application performance.
  • Managing and monitoring various FortiGate firewalls from FortiManager and FortiAnalyzer.
  • Deep-down analysis in resolving firewall-related network issues in enterprise environments.
  • Monitored network traffic using packet sniffing tools such as Wireshark to detect malicious activity.
  • Configured and maintained firewalls, intrusion detection systems, and virtual private networks.
  • Performed regular backups of critical data stored on the corporate network in accordance with established guidelines.
  • Investigated incidents of unauthorized access attempts or data breaches in order to determine their origin and scope.
  • Assisted with incident response processes by providing technical support during investigations into suspected security threats.
  • Safeguarded data through installation of firewalls and data encryption programs.
  • Configured and maintained firewalls in accordance with security policies.
  • Performed regular maintenance of firewalls to ensure optimal performance.
  • Resolved complex problems related to firewall configuration and operation.
  • Developed scripts to automate firewall rule changes.
  • Worked closely with IT teams to ensure that all changes were properly documented.
  • Monitored network traffic for malicious activities and unauthorized access attempts.
  • Assisted with the design and implementation of new firewall solutions.

Network Support Engineer

TYSN TECHNOLOGY PVT.LTD
Jaipur
06.2022 - 12.2023
  • Conducted detailed configuration troubleshooting on Cisco switches to ensure optimal performance.
  • Coordinated with field engineers remotely, enhancing issue resolution processes.
  • Elevated intricate problems to management and external IT resources as required.
  • Responded promptly to user requests for assistance with any type of networking issue.
  • Deployed wireless networks at various locations across the organization's premises.
  • Collaborated with other departments within the organization when needed on projects involving networking infrastructure.
  • Investigated and troubleshot complex network-related problems in a timely manner.
  • Created detailed documentation regarding all aspects of the networks configuration and setup process.
  • Monitored the performance of the network to ensure optimal levels of service.
  • Implemented security measures to protect the network from unauthorized access or malicious attacks.
  • Provided technical support for users having difficulty connecting to or using the network.
  • Configured and maintained various network devices such as routers, switches, firewalls.
  • Evaluated system availability, throughput and latency to lead network planning, installation, configuration, and testing.
  • Maintained positive working relationship with fellow staff and management.
  • Evaluated local area network (LAN) and wide area network (WAN) performance data to verify availability and speed, identifying network problems.
  • Trained team members and users in newly implemented and emerging technology to enhance business productivity.
  • Managing the ticket and updating the status on the ticket as per the update from the team.
  • Perform 24/7 network surveillance.
  • Checking the link-down issue, packet drop, optical power abnormality, device down, port error rate high, etc.
  • Monitor large computer network problems from the head office, and analyze problems, perform troubleshooting, and incident response on the system.
  • Monitor network performance, uptime, and respond quickly to incidents.
  • Communicate and coordinate with the FEs to ensure timely resolution.

Education

Bachelor of Science -

MDSU University
Rajasthan
01.2022

High School -

Rajasthan Board of Secondary Education
Rajasthan
01.2019

Skills

  • Firewall installation
  • Virtual private networks
  • Network monitoring
  • FortiGate
  • FortiAnalyzer
  • FortiManager
  • Forticloud
  • FortiVPN
  • Palo alto
  • Zscaler
  • SD-WAN IPSec
  • AD-VPN
  • Routing
  • Switching
  • Wireless
  • Port security
  • Nat and Pat
  • TCP and UDP
  • Network security
  • Upgradation
  • BGP
  • Deep down analysis
  • Excellent communication
  • Firewall configuration
  • Network troubleshooting
  • Load balancing
  • VPN configuration
  • Security policy implementation
  • Incident response
  • Threat analysis
  • Network security management
  • IP addressing and subnetting
  • Multitasking abilities
  • Problem-solving abilities
  • Problem solving
  • Customer support
  • Technical documentation
  • VPN implementation

Websites

Certification

  • Cisco Certified Network Associate (CCNA Routing & Switching) (Trained)
  • Cisco Certified Network Professional (CCNP Routing & Switching) (Trained)
  • Network Security Professional (NSE 4) (Trained)

Networking Knowledge

  • Configuration troubleshooting of Cisco Switches
  • Configuration & troubleshooting of Cisco Wireless Controllers
  • Configuration troubleshooting of Cisco Wireless Access Points
  • Packet flow, OSI Model, TCP/IP Model, TCP, DP, ARP, DNS, DHCP, FTP, ICMP, IP, Ethernet frame, Subnetting
  • OSPF, EIGRP, BGP, ISIS, RIPv2
  • Switching Terms and Protocols Like, STP, RSTP, VTP, VLAN, Access & Trunk, BPDU, Broadcast Storm, Multicast Storm.

Timeline

Network Administrator

Giesecke and Devrient
08.2025 - Current

Network Security Engineer

ALETHE CONSULTING PVT.LTD
12.2023 - 07.2025

Network Support Engineer

TYSN TECHNOLOGY PVT.LTD
06.2022 - 12.2023

Bachelor of Science -

MDSU University

High School -

Rajasthan Board of Secondary Education

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RAJENDRA KUMAR RANWA