FINVASIA - Linux System Administrator - Ubuntu/CentOS

Job Summary :

We are looking for a knowledgeable and proactive Linux System and Networking Administrator with strong experience in virtualization (especially Proxmox and VMware vCenter) and a deep understanding of enterprise networking.

You will be responsible for maintaining our Linux systems, managing virtualized environments, and ensuring robust and secure network operations across the organization.

Key Responsibilities :

Linux System Administration :

- Install, configure, and maintain Linux servers (Ubuntu, CentOS, RHEL) in physical and virtual environments.

- Manage web, database, file, and directory services, including Apache/Nginx, MySQL/PostgreSQL, Samba, and LDAP.

- Develop and maintain system automation scripts using Bash, Ansible, or similar tools.

- Ensure system uptime, performance, and reliability through proactive monitoring and maintenance.

Virtualization & Infrastructure Management :

- Administer and maintain Proxmox VE and VMware vCenter/ESXi virtual environments.

- Provision, clone, snapshot, and manage virtual machines and containers.

- Monitor and optimize virtual resource utilization (CPU, memory, storage).

- Assist in planning and implementing scalable, redundant virtualization infrastructure.

Network Administration :

- Design, configure, and manage LAN/WAN environments, including VLANs, routing, trunking, and link aggregation.

- Administer and maintain firewalls (e.g., pfSense, iptables, FortiGate), VPNs, and secure remote access solutions (OpenVPN, WireGuard).

- Monitor network performance and troubleshoot issues using tools like tcpdump, Wireshark, and NetFlow.

- Maintain DNS, DHCP, NAT, and port forwarding rules in both physical and virtualized networks.

Security and Compliance :

- Conduct periodic audits, patching, and updates for operating systems, hypervisors, and firewalls.

- Implement and maintain intrusion detection/prevention systems (IDS/IPS) and network access

control.

Support & Documentation :

- Document infrastructure, network diagrams, system configurations, and SOPs.

- Work closely with IT security, DevOps, and cloud teams to ensure a consistent and secure

infrastructure.

Requirements :

Experience :

- 35+ years of experience in Linux system administration and networking.

- 3+ years experience managing Proxmox or VMware vCenter environments.

Technical Skills :

- Proficient in Linux (RHEL, CentOS, Ubuntu).

- Hands-on experience with Proxmox VE, vSphere, and VMware vCenter.

- Deep understanding of networking fundamentals: TCP/IP, DNS, DHCP, VLANs, routing protocols, and NAT.

- Experience configuring and managing firewalls and VPNs.

- Strong scripting and automation skills (Bash, Ansible, or Python).

- Familiar with monitoring/logging tools: Zabbix, Grafana, ELK, or similar.

Preferred Qualifications :

- Certifications: RHCE, VCP, CCNA, CompTIA Network+, or equivalent.

- Experience with SDN, high availability setups, and network segmentation.

- Familiarity with hybrid cloud infrastructure or on-premises to cloud migrations.

Soft Skills :

- Strong analytical and troubleshooting skills.

- Ability to work independently and under pressure.

- Good communication and documentation abilities.

- Willingness to participate in an on-call rotation.