Network Engineer

Integriti Core is a Singapore-based IT services provider delivering managed infrastructure, security, and end-user support to enterprise and public-sector clients. We’re looking for a Network Engineer who has outgrown the help desk and is ready to work hands-on with switches, firewalls and wireless networks. You’ll support client networks day-to-day, carry out standard changes and help deliver new deployments, with senior engineers behind you as you build toward Level 2. What you’ll do • Monitor network health, investigate alerts, and troubleshoot LAN, WAN, Wi-Fi, and VPN issues • Resolve tickets escalated from the service desk, and escalate complex faults to Level 3 within SLA • Make standard configuration changes under approved change requests: VLANs, switch ports, trunks, port security, DHCP scopes, wireless SSIDs and basic firewall policies • Install, configure and replace switches, access points, firewalls, SFP modules and UPS units, including rack, stack and cabling work • Run firmware upgrades, configuration backups and preventive maintenance • Support site surveys, deployments and network migrations for client projects • Liaise with ISPs and vendors on circuit faults and RMA (hardware return and replacement) cases • Keep network diagrams, IP plans, inventories and operating procedures up to date • Prepare monthly network health and incident reports What we’re looking for • A Diploma or degree in IT, computer science, network engineering or a related field • 2–3 years in network support or operations, or 1+ year in a Level 1 role with strong hands-on networking exposure • CCNA certification or equivalent (required) • Solid grasp of networking fundamentals: TCP/IP, subnetting, VLANs, STP, LACP, inter-VLAN routing, static routing and basic OSPF • Hands-on work with enterprise switches, wireless access points and next-generation firewalls (Fortinet, Palo Alto, Cisco, Aruba or similar) • Familiarity with DHCP, DNS, NAT, IPsec and SSL VPN, and 802.1X/RADIUS authentication • Comfortable using network monitoring tools such as SolarWinds, PRTG or Zabbix • Good communication in English, and the ability to write clear documentation Nice to have • Fortinet FCP / NSE 4, Palo Alto PCNSA, Aruba ACA or CCNP (in progress is fine) • Experience with SD-WAN, cloud-managed networking (FortiCloud, Meraki, Aruba Central) or wireless site surveys • Basic scripting or automation using Python or Ansible • ITIL 4 Foundation