Walk-In System Administrator, Network Engineer & Linux Administrator

System Administrator, Network Engineer & Linux AdministratorExperience: 2-4 YearsEmployment Type: Full-TimeDate : 24th October 2026 (Saturday)Time : 11 AM - 2 PMLocation: Greeksoft Technologies Pvt. Ltd. 507, 5th floor, western edge 1, western express highway, Borivali East, Mumbai 400066.Job Summary

We are looking for a skilled IT Infrastructure Engineer with hands-on experience in System Administration, Network Engineering, and Linux Administration. The candidate will be responsible for managing, maintaining, securing, and troubleshooting the organization's IT infrastructure, including Windows and Linux servers, networking devices, firewalls, virtualization platforms, and cloud environments.

System Administrator

• Install, configure, maintain, and troubleshoot Windows Servers, desktops, laptops, printers, and related hardware.
• Manage Active Directory, DNS, DHCP, Group Policies (GPO), Microsoft 365, SQL Database, Hyper-V, and VMware environments.
• Perform server installation, configuration, migration, patching, upgrades, and performance monitoring.
• Manage user accounts, permissions, security policies, and access controls.
• Implement and maintain backup, disaster recovery, and data protection solutions.
• Maintain IT infrastructure including operating systems, application servers, email systems, hardware, and software.
• Prepare and maintain technical documentation for infrastructure, hardware, software, and processes.

Network Engineer

• Configure, implement, and troubleshoot routers, switches, firewalls, VPNs, and network services.
• Manage network security, device hardening, and access controls.
• Configure and support Routing Protocols (OSPF, EIGRP, BGP) and Switching Technologies (VLAN, STP, RSTP, HSRP, VRRP, VRF, Port Channel).
• Configure and manage IPSEC Site-to-Site VPN, SSL VPN, and Remote Access VPN solutions.
• Administer enterprise firewalls including Fortinet, Palo Alto, Cisco ASA, Check Point, Juniper, and SonicWall.
• Monitor network performance and ensure maximum uptime and availability.
• Troubleshoot network and security incidents and perform root cause analysis.

Linux Administrator

• Install, configure, maintain, and upgrade Linux servers (RHEL/Rocky Linux/CentOS).
• Monitor system performance and troubleshoot system, network, and service issues.
• Manage users, permissions, storage, LVM, packages, and system services.
• Configure networking, DNS, NTP, SSH, firewalls, and SELinux.
• Perform security patching, system hardening, backups, and disaster recovery.
• Automate routine tasks using Bash/Python and maintain documentation.
• Collaborate with cross-functional teams and provide on-call support when required.
• Knowledge of virtualization, containers, and monitoring tools.