Tìm việc làm IT

**About the Role**

Own the operation, monitoring, troubleshooting and maintenance of Masan's core network across our corporate office, selected Data Center domains and multi-cloud environments.

Beyond day-to-day multi-vendor operations, you will support IT teams across Masan's member companies with L2/L3 escalations, run periodic Network & Firewall Audits, and provide technical advisory to standardize network infrastructure across the Group.

**What You'll Do**

• Operate, configure and maintain the office network and assigned Data Center domains (Core/Spine-Leaf switching, vPC/Stacking, Load Balancers), plus WAN and SD-WAN.
• Manage the enterprise wireless estate (Access Points, Wireless Controllers): RF optimization, roaming, QoS, DHCP/DNS and 802.1X/NAC authentication.
• Run multi-vendor firewalls (Palo Alto, Fortinet, Cisco) and their management platforms (Panorama, FortiManager, FortiAnalyzer): policy and NAT changes, IPsec/SSL VPN, IDS/IPS and network segmentation.
• Build and maintain Hybrid/Multi-Cloud connectivity across Azure, AWS and GCP (ExpressRoute, Direct Connect, Cloud Interconnect, VPN Gateway, VNet/VPC routing, Transit Gateway, Load Balancer).
• Support member-company IT teams with network operations and L2/L3 escalations; conduct periodic network/firewall configuration audits and recommend infrastructure optimizations.
• Monitor availability, capacity and performance via NMS tools (Zabbix, PRTG, SolarWinds, SNMP, Syslog, NetFlow) to meet SLAs on uptime, latency and bandwidth.
• Analyze logs and packet captures (Wireshark, tcpdump) to resolve complex incidents and author Root Cause Analysis (RCA) reports for major events.
• Coordinate with ISPs on circuit quality and SLAs, and with vendors (Cisco, Fortinet, Palo Alto, Huawei, Juniper) on TAC cases and hardware RMA.
• Perform scheduled maintenance: config backups, health checks, firmware/OS upgrades and CVE patching under Change Management.
• Maintain accurate technical documentation (network diagrams, IPAM/NetBox, standard configs, SOPs/runbooks) and automate repetitive tasks with Ansible, Terraform and Python.
• Join UAT, cutover and operational handover for new infrastructure and cloud migrations.

**What We're Looking For**

• Bachelor's degree in IT, Computer Science, Electronics & Telecommunications or a related field.
• **Experience:**

3–5 years (Network Engineer) or 5+ years (Senior Network Engineer) in enterprise network operations across office, multi-branch, Data Center or Cloud environments.

• Hands-on configuration and troubleshooting of multi-vendor firewalls (Palo Alto, FortiGate, Cisco Firepower; Panorama, FortiManager/FortiAnalyzer), switches/routers (Cisco Catalyst/Nexus, FortiSwitch, Huawei, Juniper) and wireless (Cisco WLC/Meraki, FortiAP, Aruba).
• Solid command of routing, switching and network security protocols: BGP, OSPF, VXLAN, VRF, VLAN, STP, LACP, StackWise, vPC/VSS, QoS, 802.1X/RADIUS, IPsec/SSL VPN, NAC.
• Experience operating SD-WAN (Fortinet Secure SD-WAN, Cisco Viptela/Meraki, VeloCloud) and Hybrid Cloud networking on Azure, AWS or GCP.
• Proficiency with monitoring tools (Zabbix, PRTG, SolarWinds), IPAM (NetBox) and packet analysis (Wireshark, tcpdump); network/firewall audit experience.
• Strong ownership and operational discipline in Production, with strict adherence to Change Management.
• Strong communication and consulting skills to work with member-company IT teams, infrastructure teams and partners.
• Willingness to be on-call for critical incidents and maintenance windows.

**Nice to Have**

• Network automation experience (Ansible, Terraform, Python).
• Certifications: CCNA/CCNP, Fortinet NSE 4–7, Palo Alto PCNSA/PCNSE, or Cloud Networking certifications.
• Curiosity for emerging approaches such as SASE, Zero Trust and Network-as-Code.

**Why Join Masan**

• Operate network infrastructure at Group scale, spanning multiple businesses, Data Centers and three major clouds.
• Influence standards across member companies, not just one environment.
• Work with enterprise-grade multi-vendor technology and grow toward architecture and automation.