Network & System Administrator (3-5 YoE | English Speaking)

We are looking for a hands- on Network and System Administrator with 3 to 5 years of proven experience in both enterprise networking and server administration. Your primary mission is to deploy, optimize, and troubleshoot enterprise servers, networks, and hybrid cloud environments, guaranteeing uncompromised security and high availability.
Key Responsibilities
Network Administration & Security

Monitoring & Incident Response: Monitor network traffic and performance trends using diagnostic tools (Wireshark, PRTG, Zabbix, SolarWinds). Respond quickly to service disruptions and implement corrective actions.
Infrastructure Management: Configure and maintain network hardware, including switches, routers, wireless access points, and firewalls (specifically Fortinet/FortiGate).
Protocol & Connectivity: Implement and manage VPNs, VLANs, QoS, NAT, and advanced routing protocols (OSPF, BGP).
Security & Maintenance: Conduct regular vulnerability scans, perform firmware updates, and collaborate with security teams to enforce network hardening.
Vendor Coordination: Act as the primary technical point of contact with ISPs and external vendors for troubleshooting and infrastructure upgrades.

System & Server Administration

Automation: Utilize scripting tools (PowerShell, Bash) to automate repetitive administrative tasks and improve operational efficiency.
Identity & Access: Administer Active Directory, DNS, DHCP, file services, GPOs, LDAP, and Single Sign- On (SSO) systems.
Server Management: Install, configure, and administer physical and virtual servers running Windows and Linux OS.
Disaster Recovery: Maintain highly reliable backup systems (e.g., Veeam) and perform routine disaster recovery testing to ensure business continuity.
Virtualization & Cloud: Manage enterprise virtualization platforms (VMware, Hyper- V, Proxmox) and hybrid cloud infrastructures (Azure, AWS).

Documentation & Compliance

Ensure all infrastructure setups strictly comply with internal IT policies and security standards.
Maintain highly accurate and up- to- date documentation of network topologies, IP schemas, equipment inventory, and troubleshooting guides.

What We Offer

Attractive salary based on experience
Full social insurance paid based on actual salary
13th- month bonus (based on business performance)
A multicultural environment with real growth opportunities
Annual health check and 12 paid leave days per year
All necessary work equipment
Annual salary & performance reviews

Requirements
Must- Have
Education: Bachelor’s degree in Networking, Information Technology, Computer Science, or a related field.
Experience: 3- 5 years of experience managing enterprise networks, Windows and Linux server administration.
Languages: Professional working proficiency in English
Technical Stack:

Deep understanding of TCP/IP architecture and enterprise wired/wireless technologies.
Strong proficiency in virtualization (VMware/Hyper- V) and Microsoft ecosystem (AD, Group Policies).
Proven experience with Fortinet/FortiGate firewalls.

Nice- To- Have
Advanced Automation: Experience with configuration management and infrastructure- as- code tools (Ansible, Terraform, Python).
Professional Certifications:

Network & Security: Cisco (CCNA/CCNP), CompTIA Network+, Fortinet (NSE), Palo Alto.
Systems: Microsoft (MCSA/MCSE), Linux (RHCSA/RHCE), VMware (VCP).

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Cập nhật gần nhất lúc: 2026-04-16 13:55:05