Rengaraj D
Chennai
Summary
Experienced IT Infrastructure Engineer with over 5 years of expertise in Linux and Windows Server administration. Skilled in networking, including LAN/WAN management and IT infrastructure oversight. Demonstrated ability to lead technical teams, resolve system issues, and enhance performance in enterprise environments. Specialized as a Hardware & Networking Engineer, with a strong background in network design and LAN/WAN configurations.
Overview
10
10
years of professional experience
2011
2011
years of post-secondary education
1
1
Certification
2
2
Languages
Work History
Assistant Manager – Technical
Door Sabha Nigam Limited
04.2024 - 01.2025
- Installed, configured, and maintained Linux distributions (CentOS, Ubuntu, RHEL) across 150+ servers
- Managed GSuite Workspace and O365 administration, supporting 200+ employees
- Led a team of 5 engineers, managing IT operations
- Granted and managed VPN access, ensuring secure connectivity
- Collaborated with the sales team to provide customer solutions
- Analyzed system logs and traces to troubleshoot issues
- Optimized SQL queries and performed database backups/restorations
- Handled IT procurement, ensuring timely acquisition of hardware and services
- Managed IP allocations for over 150 devices and conducted periodic network audits
Senior Engineer
Door Sabha Nigam Limited
04.2023 - 03.2024
- Installed and maintained Gateway servers for telecom connectivity (ISDN/PRI, SIP)
- Configured firewall policies on WatchGuard XTM 505, enhancing security
- Managed VLANs, routers, and access points for optimal network performance
- Monitored system performance using Nagios, ensuring uptime
- Created network diagrams and maintained technical documentation
- Trained junior engineers and improved overall team efficiency
- Performed preventive maintenance to ensure system stability
Engineer
Door Sabha Nigam Limited
01.2021 - 03.2023
- Installed system software and upgrades periodically
- Maintained and repaired servers, routers, switches, and backup systems
- Conducted preventive maintenance on IT hardware and peripherals
- Provided remote support for various locations
- Managed IT support tickets via Smarter Tracker, ensuring timely resolution
IT Executive
Altruist Customer Management India Pvt Ltd
05.2019 - 01.2021
- Managed Windows Server (2003, 2008, 2016) and Active Directory
- Handled domain user IDs, OU movements, and password resets
- Designed, configured, and installed network devices
- Applied Group Policies (GPOs) for enhanced security compliance
- Performed daily backups using Symantec Backup Exec and LTO tape drives
- Managed Cisco ASA 5525-X Firewalls and Catalyst 3560G Switches
Credit Verification Officer
IndusInd Marketing and Financial Services Pvt Ltd
12.2014 - 04.2019
- Reviewed and verified financial documents for creditworthiness
- Ensured compliance with company credit policies and regulations
- Analyzed CIBIL reports to assess financial risk
Education
Bachelor of Computer Science Engineering -
Annamalai University
Skills
Cisco Certified Network Associate
Certification
Cisco Certified Network Associate (CCNA) - Cisco Systems.
Personal Information
Date of Birth: 07/06/89
Marital Status: Married
Address : No 9, Suriyan Street, Sekar Nagar, New Perungalathur, Chennai-600 063.
Disclaimer
I hereby declare that all the details furnished above are true to the best of my knowledge.
Place: Chennai
Date:
D. Rengaraj
Timeline
Assistant Manager – Technical
Door Sabha Nigam Limited
04.2024 - 01.2025
Senior Engineer
Door Sabha Nigam Limited
04.2023 - 03.2024
Engineer
Door Sabha Nigam Limited
01.2021 - 03.2023
IT Executive
Altruist Customer Management India Pvt Ltd
05.2019 - 01.2021
Credit Verification Officer
IndusInd Marketing and Financial Services Pvt Ltd
12.2014 - 04.2019
Cisco Certified Network Associate (CCNA) - Cisco Systems.
Bachelor of Computer Science Engineering -
Annamalai University
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