Senior Campus & SD-WAN Network Engineer

Optimum Solutions Pte Ltd; Singapore; On-site; SGD 90,000 - 180,000; Full time

Job summary

Optimum Solutions Pte Ltd is seeking a Network Engineer (Campus and NAC) to join its infrastructure team in Singapore. You will lead end-to-end design, build, and lifecycle engineering of the campus network, wireless architecture, WAN/SD-WAN, and NAC platforms.

You will be the on-site technical authority, driving hands-on implementations, wireless surveys, site deployments, and data centre cage installations, while serving as the primary escalation point for complex access and campus networking

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, or a related discipline.
• 6 to 10 years hands-on enterprise campus network engineering experience.
• Proven implementation experience with Cisco Catalyst 9K switching in large-scale enterprise environments.
• Strong background in enterprise wireless design (Cisco, Juniper, Aruba, or Meraki) and proficiency with wireless survey tools (Ekahau) or equivalent.
• Advanced expertise in Cisco ISE (802.1X/MAB, profiling, posture, guest, and TACACS+ policy design).
• Familiarity with Forescout eyeSight/eyeControl and NAC coexistence strategies.
• Hands-on SD-WAN design and deployment (Cisco Catalyst SD-WAN/Viptela, Meraki, or similar) with Singapore telecom carriers.

Responsibilities

• Campus & Wireless Engineering: Design and implement Cisco Catalyst 9K campus switching standards, hardware refreshes, software upgrades, and network segmentation.
• Hands-on Implementation: Lead on-site deployments, structured cabling coordination, equipment migrations, and data centre cage infrastructure work.
• Network Access Control (NAC): Architect and configure Cisco ISE policies (802.1X, MAB, device profiling, posture assessment, guest access, and TACACS+ device administration).
• Forescout & Coexistence: Design eyeSight classification, eyeControl actions, and ensure visibility over agentless, IoT, and OT devices; maintain NAC coexistence designs.
• WAN, SD-WAN & Governance: Design enterprise SD-WAN topologies, site templates, and rollout strategies; manage circuit implementations with carriers.
• Compliance & ITIL Change Management: Author engineering designs and implementation plans adhering to ITIL change processes; support audit requirements with robust access controls.

Skills

Enterprise campus network engineering

Wireless design

Analytical & troubleshooting

Collaborative communication

NAC coexistence understanding

Education

Bachelor’s degree in Computer Science/IT or related

Tools

Cisco Catalyst 9K switching

Cisco ISE

Forescout eyeSight/eyeControl

Ekahau (survey tools)

SD-WAN (Catalyst / Viptela)

Meraki/Aruba/Juniper wireless platforms

Job description

Optimum Solutions Pte Ltd is seeking a Network Engineer (Campus and NAC) to join its infrastructure team in Singapore. You will lead end-to-end design, build, and lifecycle engineering of the campus network, wireless architecture, WAN/SD-WAN, and NAC platforms.

You will be the on-site technical authority, driving hands-on implementations, wireless surveys, site deployments, and data centre cage installations, while serving as the primary escalation point for complex access and campus networking