Midhun Krishna

Results-driven Linux and Network Administrator with 6+ years of experience managing enterprise IT infrastructure, network security, and server environments. Proficient in Linux server administration (Ubuntu, RHEL, CentOS), CI/CD pipelines, firewall management, VLAN configuration, and network monitoring. Adept at troubleshooting complex hardware and software issues across large-scale healthcare and enterprise environments.

Linux & Network Administrator at Benzy Infotech Pvt. Ltd. (2023-06 – Present)

• Designed and implemented CI/CD pipelines using Git and Jenkins to automate software release processes, reducing deployment time.
• Configured and managed Linux servers (Ubuntu, Red Hat, CentOS) in production and development environments.
• Administered AWS and VMware virtualization platforms for scalable infrastructure management.
• Deployed and managed Docker containers for application isolation and streamlined delivery.
• Created and maintained user accounts, VPN tunnels, NAT rules, and firewall policies on Sophos XG 125.
• Managed production firewall (SonicWall Nsa4700) for Akbar corporate network, ensuring security and uptime.
• Monitored network health and storage devices using Centreon, Wazuh, and PRTG monitoring tools.
• Configured and managed BGP routing on Juniper SRX 380 firewall, including peer establishment, route policies, and path selection for reliable internet connectivity.

Junior System Engineer at Amrita Institute of Medical Sciences (2019-12 – 2023-03)

• Managed IT service tickets, prioritizing and resolving hardware and software incidents for clinical and administrative staff.
• Provided hands-on support for Dell and HP desktops, workstations, and servers (Dell PowerEdge R430, R730, R730xd).
• Configured Site-to-Site VPN using Cisco and Sophos; managed VPN on Sophos XG 450 and 125 firewalls.
• Designed and implemented network architecture including VLAN segmentation and Access Control Lists (ACLs) for secure traffic management.
• Deployed and managed switching environments with Juniper EX2300, Cisco 2960/2960-X/2960PoE, Aruba 2930, HP ProCurve, Allied Telesis, Netgear, and D-Link switches.
• Configured and maintained wireless networks using Cisco 5500 & 2100 and Aruba 7210 WLCs; enforced access via MAC filtering and Aruba ClearPass.
• Administered internet policy and rules through FortiGate, Sourcefire, and Sophos appliances.
• Supported Linux servers in production and test environments; installed and troubleshot MySQL instances.
• Performed MySQL, WildFly, and Tomcat backup and restoration tasks.
• Implemented HAProxy load balancer for high-availability service delivery.
• Developed and maintained CCTV network in compliance with relevant legislation and organizational policy.
• Monitored network and server applications using Zabbix, ICINGA, and Observium.
• Configured DHCP, DNS, and Proxy servers; installed and managed RED VPN client.

System Administrator at BD Tech Pvt. Ltd. (2019-05 – 2019-12)

• Performed daily data backups and verified restoration procedures to ensure business continuity.
• Maintained hardware and software systems, including patching and upgrades.
• Provided remote technical support to clients, resolving issues efficiently.

Bachelor of Technology (B.Tech) in Information Technology

3-Year Diploma in Applied Electronics