Manager, Interconnect & Fixed Voice Operations

Singtel Group; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Singtel Networks is seeking a Manager for Interconnect & Fixed Voice Operations in Singapore. You will oversee day-to-day operations, system administration, and regulatory compliance for local fixed voice interconnects, ensuring high service availability and efficient provisioning.

Lead fault management, patching, and cybersecurity practices, while coordinating with operators, vendors, and internal teams to meet service levels and regulatory directives.

Qualifications

• Degree in IT/Computer or equivalent in telecom, networking and IT.
• Strong knowledge of telecom networking protocols and interconnect concepts.
• Experience with legacy signaling (SS7/ISDN) and SIP-based voice systems.
• Linux knowledge and system administration experience.

Responsibilities

• Oversee daily BAU operations of local fixed voice interconnect systems for high availability.
• Ensure timely service provisioning, monitoring, and number porting activities.
• Manage interconnect junctions and signalling links with operators (FBO/SBO/OLO).
• Lead troubleshooting and root cause analysis for call failures and porting issues.
• Handle escalations from TAC, INOC, ISMC and external partners.
• Collaborate with stakeholders to ensure accurate order capture and provisioning.

Skills

Telecom networking

TCP/IP

DNS

DHCP

SS7/ISDN

SIP-based voice

Linux

Interconnect architecture

Number portability

Call routing

Education

IT/Computer Science degree

Job description

Manager, Interconnect & Fixed Voice Operations

Singtel Networks, the most established telecommunications infrastructure provider in Singapore is transforming to enable the digital generation of tomorrow. We are introducing new capabilities in 5G, Cloud, Analytics, Digital Commerce, Software Engineering, Cyber Security to enhance our core competencies and deliver innovative and differentiated Mobile and Fixed services (Broadband, TV and Telephony) for our customers. We are committed to celebrating inclusion and diversity and is a strong believer to upskill and nurture all individuals. Come join us today as we build Singtel’s Networks of tomorrow, and Empower Every Generation to live, work and play in new ways!

The Manager, Interconnect & Fixed Voice Operations is responsible for overseeing the day-to-day operations, maintenance, and performance of Singtel’s local fixed voice interconnect systems. This role ensures seamless connectivity between Singtel and local and international operators, while maintaining high service availability, operational efficiency, and regulatory compliance.

The incumbent will lead operational activities including system administration, fault management, service provisioning, and number portability operations. The role also drives cybersecurity compliance through system patching, vulnerability management, and audit readiness.

In addition, the role requires close collaboration with internal stakeholders, external operators, and vendors to resolve service issues, implement system enhancements, and support regulatory directives such as scam call mitigation in partnership with IMDA and SPF.

Operations & Service Management

• Oversee daily BAU operations of local fixed voice and interconnect systems to ensure high availability and performance
• Ensure timely service provisioning, system monitoring, and execution of number migration/porting activities
• Manage interconnect junctions and signalling links between Singtel and local/overseas operators (FBO/SBO/OLO)
• Lead troubleshooting and root cause analysis of service issues, including call failures, signalling faults, and number portability issues
• Manage and resolve escalations from TAC, INOC, ISMC, 1608, and external partners
• Ensure timely handling of critical and urgent incidents, including after-office-hours escalations (e.g. VIP/VVIP cases)
• Act as the key point of contact for interconnect-related matters with external operators and partners
• Liaise with internal stakeholders (Work Order, Product, Account teams) to ensure accurate order capture and timely provisioning
• Engage vendors for issue escalation, including hardware replacement, software fixes, patching, and system upgrades

System Administration & Lifecycle Management

• Manage system configuration, software upgrades, patching, and performance optimization
• Oversee equipment lifecycle management, including refresh planning and execution
• Review and govern Method of Procedure (MOP) for system changes and upgrades

Security, Compliance & Audit

• Ensure systems meet cybersecurity standards through regular patching, vulnerability scanning, and mitigation
• Support internal and external audit exercises and ensure proper documentation and controls
• Manage IMDA directives related to scam prevention, including testing and implementation

Regulatory & Special Operations Support

• Work with IAR, IMDA, and SPF to support scam call blocking initiatives and regulatory requirements
• Support special events and emergency preparedness activities (e.g. SPF contingency planning)

Resource & Capacity Management

• Manage C4 resource planning, including onboarding of new interconnect partners and capacity expansion

Skills for success:

• Degreein IT/Computeror equivalent work experience intelecom,networking and IT

Strong knowledge of telecom networking, including TCP/IP, DNS, DHCP

Experience withlegacysignalingprotocols (SS7/ISDN) and SIP-based voice systems
Linux knowledge

Understanding of interconnect architecture, number portability, and call routing

At Singtel, we believe in the strength of a vibrant, diverse and inclusive workforce where backgrounds, perspectives and life experiences of our people help us innovate and create strong connections with our customers. We strive to ensure all our people practices are non-discriminatory and provide a fair, performance-based work culture that is diverse, inclusive and collaborative.
Join us and experience what it’s like to be with an Employer of Choice*. Together, let’s create a brighter digital future for all. *Awarded at the HR Fest Awards 2020.