Senior Network Engineer - Voice Transport & Cisco Data Center

INFRASOFT TECHNOLOGIES PTE LTD; Singapore; On-site; SGD 180,000 - 240,000; Full time

Job summary

INFRASOFT TECHNOLOGIES PTE LTD is seeking an senior Enterprise Network Engineer with 10+ years’ experience in voice transport and Cisco data center technologies. You will design, deploy and optimize voice infrastructure across global sites, and manage CUCM, CUBE, Unity, and security for mission-critical deployments.

Join a team focused on high availability, performance tuning, and advanced routing with multi-site Cisco DC architectures and Infoblox IPAM.

Qualifications

• Senior level candidate with 10+ years in enterprise network engineering focusing on voice transport and Cisco DC.
• Hands-on expertise with Cisco ACI fabrics and Nexus platforms across multi-site deployments.
• Strong experience with VoIP, SIP, SBCs, CUCM, CUBE, and voice quality optimization.

Responsibilities

• Design, deploy, and support Voice Transport systems across global sites.
• Manage Cisco Collaboration platforms (CUCM, CUBE, Unity, IM&P) and maintain call routing.
• Architect Cisco DC fabrics, ensure high availability and disaster recovery readiness.
• Lead L2/L3 network design with BGP, OSPF, EIGRP, MPLS, VRF, and advanced routing policies.
• Ensure security governance with segmentation, ACLs, and encryption.

Skills

Voice transport

Cisco DC

VoIP

SIP

Routing protocols

Infoblox

Documentation

Tools

Cisco ACI

Nexus switches

CUCM

CUBE

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)