R. Ranjithkumar
Network Security Engineer
Chennai
Summary
Accomplished and results-oriented Network Security Engineer with over 6 years of experience in implementing and managing robust security infrastructures. Proficient in a wide range of security technologies. Proven ability to reduce network attack surfaces, enforce least-privilege access, and respond to security incidents. Adept at creating and enforcing Zero Trust security policies and ensuring compliance with industry standards.
Overview
9
9
years of professional experience
2016
2016
years of post-secondary education
4
4
Certifications
2
2
Languages
Work History
Senior Cyber Security Engineer
Cognizant Technology Solutions
09.2022 - Current
- Deployed and managed Guardicore to implement microsegmentation policies across the network.
- Worked in Illumio microsegmentation POC.
- Configuring the NAC posture policy and authorization policy, remediation ACL as per the compliance requirements.
- Installation and upgradation of ISE OS version and patches.
- Configured access control policy and intrusion policy in Cisco Firepower.
- Installation and upgradation of FTD and FMC patches and fxos versions
- Monitoring Network behavior using the Cisco SNA, managing the alarms triggered.
- Analyzing the critical level of the alarming hosts and taking appropriate action.
- Project: Horizon BCBSNJ
Network Security Engineer
NTT India Private Ltd
10.2021 - 09.2022
- Installation and upgradation of checkpoint Gaia OS version.
- Applying Jumbo Hotfix to security gateways & security management server.
- Troubleshooting Checkpoint and ASA firewall related issues.
- Experience in troubleshooting Cisco ISE (NAC) secure network communication on the endpoints.
- Configuring the NAC posture policy and authorization policy.
- Configured access control policy and intrusion policy in Cisco Firepower.
- Monitoring Network behavior using the CISCO Stealth watch, managing the alarms triggered.
- Analyzing the critical level of the alarming hosts and taking appropriate action.
- Managing checkpoint and ASA firewall using the Algosec firewall analyzer.
- Fine tuning the policy optimization like rules cleanup, rules re-ordering, object cleanup and intelligent policy tuner by using AFA.
- Executing access rule and NAT in Firewall for the change request from customer.
- Project: Indian Bank
Network Engineer
ACLIV TECHNOLOGIES PVT LTD
07.2019 - 02.2020
- NAC Implementation and Support.
- Configuring and troubleshooting Cisco Router 1941,2811, ISR4221, ISR4351.
- Configuring and troubleshooting Cisco Switches C9300, C2960, Nexus9K.
- HP Aruba- 2930F Switches NAC Implementation and troubleshooting.
- Troubleshooting with routing Protocols OSPF and BGP.
- Project: Indian Overseas Bank and CUB
Associate Trainee Engineer
CMS IT SERVICES PVT LTD
11.2016 - 01.2019
- Monitoring & configuring cisco switches and routers.
- Installing and troubleshooting in windows operating systems.
- LAN level troubleshooting such as VALN issues Network connectivity issues in End points.
- Troubleshooting in Active Directory and DHCP related issues.
- Project: Financial Software and Systems
Education
B.E - Electronics and communication Engineering
Chettinad College of Engineering and Technology
HSC - undefined
SKV Higher Secondary School
SSLC - undefined
SKV Higher Secondary School
Skills
Akamai Guardicore (Microsegmentation Solution)
- Splunk
- Cisco ASA 5K Series
- Checkpoint Firewall 4800,7000,12000,23000 (R8030, R8040)
- Zscaler Proxy
- Palo Alto Firewall
- Cisco Firepower IPS
- Cisco SNA
- Cisco ISE-NAC and AAA
- Illumio (Microsegmentation Solution)
- Akamai Guardicore (Microsegmentation Solution)
Certification
Guardicore Certified Segmentation Administrator GCSA
Disclaimer
I hereby declare you that the information furnished above are true to the best of my knowledge.
Timeline
Senior Cyber Security Engineer
Cognizant Technology Solutions
09.2022 - Current
Network Security Engineer
NTT India Private Ltd
10.2021 - 09.2022
Network Engineer
ACLIV TECHNOLOGIES PVT LTD
07.2019 - 02.2020
Associate Trainee Engineer
CMS IT SERVICES PVT LTD
11.2016 - 01.2019
HSC - undefined
SKV Higher Secondary School
SSLC - undefined
SKV Higher Secondary School
B.E - Electronics and communication Engineering
Chettinad College of Engineering and Technology
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