Senior Network Engineer – Voice Transport & Cisco Data Center

Infrasoft Technologies Limited; Singapore; Sur place; SGD 180 000 - 240 000; Plein temps

Résumé du poste

Infrasoft Technologies Limited is seeking a seasoned Enterprise Network Engineer with extensive experience in voice transport and Cisco data center architectures. The role covers design, deployment, and optimization across global sites, including CUCM/CUBE/Unity and advanced routing.

You will shape security policies, ensure high availability, and lead multi-site DC fabric initiatives. Candidates should have 10+ years in enterprise networks, strong Cisco ACI/Nexus expertise, and a track record of

Qualifications

• 10–20+ years in enterprise network engineering with focus on voice transport and Cisco DC
• Hands-on expertise with Cisco ACI, Nexus platforms, and DC fabric technologies
• Strong experience with VoIP, SIP, SBCs, CUCM, CUBE, and voice quality optimization
• Deep understanding of routing protocols, QoS, multicast, and network performance engineering
• Experience with Infoblox DNS/DHCP/IPAM
• Proven experience supporting large-scale, multi-site enterprise networks (manufacturing/automotive preferred)
• Strong documentation and architecture skills

Responsabilités

• Design, deploy, and support Voice Transport systems including SIP, RTP, SBCs, PRI gateways, and VoIP infrastructure across global sites
• Manage and optimize Cisco Collaboration platforms (CUCM, CUBE, Unity, IM&P)
• Maintain dial plans, call routing, QoS policies, codec strategies, and voice quality SLAs
• Integrate voice systems with WAN, SD-WAN, MPLS, and cloud telephony platforms
• Conduct voice traffic analysis, capacity planning, and performance tuning
• Architect and operate Cisco ACI fabrics, including multi-pod/multi-site deployments
• Manage Cisco Nexus platforms (9K/7K/5K), vPC, VXLAN, EVPN, and spine-leaf architectures
• Implement segmentation, micro-segmentation, and security policies
• Support DC migrations, new plant deployments, and compute/storage integration
• Ensure high availability, redundancy, and disaster recovery readiness
• Lead L2/L3 network design using BGP, OSPF, EIGRP, MPLS, VRF, and advanced routing policies
• Implement QoS, traffic engineering, and performance optimization
• Manage DNS/DHCP/IPAM platforms (Infoblox preferred)
• Develop HLD/LLD, network diagrams, test plans, and operational runbooks
• Drive incident resolution, root-cause analysis, and continuous improvement
• Apply cybersecurity standards across voice and DC environments (ACLs, segmentation, encryption)
• Collaborate with security teams on audits, compliance checks, and vulnerability remediation
• Ensure designs comply with global IT policies and regulatory frameworks

Connaissances

Voice transport

Cisco DC

VoIP/SIP

Routing protocols

QoS engineering

Infoblox DNS/DHCP/IPAM

Outils

Cisco ACI

Nexus switches

EVPN

VXLAN

Description du poste

Key Responsibilities

Voice Transport & Unified Communications

• Design, deploy, and support Voice Transport systems including SIP, RTP, SBCs, PRI gateways, and VoIP infrastructure across global sites
• Manage and optimize Cisco Collaboration platforms (CUCM, CUBE, Unity, IM&P)
• Maintain dial plans, call routing, QoS policies, codec strategies, and voice quality SLAs
• Integrate voice systems with WAN, SD-WAN, MPLS, and cloud telephony platforms
• Conduct voice traffic analysis, capacity planning, and performance tuning

Cisco Data Center

Network

• Architect and operate Cisco ACI fabrics, including multi-pod/multi-site deployments
• Manage Cisco Nexus platforms (9K/7K/5K), vPC, VXLAN, EVPN, and spine-leaf architectures
• Implement segmentation, micro-segmentation, and security policies
• Support DC migrations, new plant deployments, and compute/storage integration
• Ensure high availability, redundancy, and disaster recovery readiness

Enterprise

Network

ing

• Lead L2/L3 network design using BGP, OSPF, EIGRP, MPLS, VRF, and advanced routing policies
• Implement QoS, traffic engineering, and performance optimization
• Manage DNS/DHCP/IPAM platforms (Infoblox preferred)
• Develop HLD/LLD, network diagrams, test plans, and operational runbooks
• Drive incident resolution, root-cause analysis, and continuous improvement

Security, Compliance & Governance

• Apply cybersecurity standards across voice and DC environments (ACLs, segmentation, encryption)
• Collaborate with security teams on audits, compliance checks, and vulnerability remediation
• Ensure designs comply with global IT policies and regulatory frameworks

Required Skills & Experience

• 10–20+ years in enterprise network engineering with focus on voice transport and Cisco DC
• Hands-on expertise with Cisco ACI, Nexus platforms, and DC fabric technologies
• Strong experience with VoIP, SIP, SBCs, CUCM, CUBE, and voice quality optimization
• Deep understanding of routing protocols, QoS, multicast, and network performance engineering
• Experience with Infoblox DNS/DHCP/IPAM
• Proven experience supporting large-scale, multi-site enterprise networks (manufacturing/automotive preferred)
• Strong documentation and architecture skills

Preferred Certifications

• CCNP/CCIE (Routing & Switching, Data Center, Collaboration)
• Cisco ACI Specialist certifications
• Voice/UC certifications (Collaboration track)