Senior Network Engineer – Voice Transport & Cisco Data Center

INFRASOFT TECHNOLOGIES PTE LTD; Singapore; On-site; SGD 120,000 - 210,000; Full time

Job summary

INFRASOFT TECHNOLOGIES PTE LTD in Singapore is seeking an experienced Senior Network Engineer focused on Voice transport and Cisco Data Center. You will design, deploy, and operate voice and data center fabrics across global sites, ensuring performance, security, and reliability.

The role requires hands-on expertise with Cisco ACI/Nexus, CUCM/CUBE, and Infoblox, plus strong routing, QoS, and multi-site architecture skills.

Qualifications

• 10–20+ years in enterprise network engineering with focus on voice transport and Cisco DC.
• Hands-on expertise with Cisco ACI fabrics, 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.

Responsibilities

• 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

Skills

Voice transport

Cisco DC

VoIP

SIP

SBCs

CUCM

CUBE

Voice quality optimization

Routing protocols

QoS

Tools

Cisco ACI

Cisco Nexus

Infoblox DNS/DHCP/IPAM

Job description

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

ing

• 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

Engineering

• 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)