Manager_2L Voice Core Engineer - VOIS

VOIS (Vodafone Intelligent Solutions) is a strategic arm of Vodafone Group Plc, creating value for customers by delivering intelligent solutions through Talent, Technology & Transformation.
As the largest shared services organisation in the global telco industry with 30,000 FTE, our portfolio of next-generation solutions and services are designed in partnership with customers across Vodafone Group, local markets, and partner markets to simplify and drive growth. With our strategic partner Accenture, we work alongside our Vodafone customers, other Telco and tech companies to drive transformation, meet the challenges of our industry and ensure we stay relevant and resilient. This partnership is a unique, industry-first model which brings together the best of in-house and 3rd party capability.
We work with customers across 28 countries from 10 VOIS locations: Albania, Egypt, Hungary, India, Romania, Spain, Turkey, UK, Germany, Ireland, and with a network of teams in Czech Republic, Italy, Greece, and Portugal.
#VOIS #BeUnrivalled #CreateTheFuture

We are seeking a skilled professional to support, manage, and optimise IMS and CS Core network elements to ensure the stability, reliability, and quality of voice and multimedia services. The individual will contribute to incident resolution, performance analysis, configuration activities, software lifecycle management, and collaboration with cross‑functional teams and external partners. This role is well‑suited for those who thrive in dynamic operational environments and are committed to continuous improvement.

Core Network Support

• Support IMS network elements including Ericsson MTAS, CSCF, HSS, IPWorks, MSC, MGW, SBC, and STP.
• Maintain service availability, performance, and compliance with operational processes.
• Participate in 24x7 on‑call rotation for proactive and reactive support.
• Assist in service introduction and handle supplier engagement.

Incident & Problem Management

• Respond promptly to service degradations and major incidents.
• Perform root cause analysis and workarounds to minimise service disruption.
• Collaborate across teams to ensure timely resolution.

Performance & Availability Management

• Act as system owner, overseeing platform support.
• Monitor KPIs, analyse performance trends, and support improvement forums.
• Review network changes to safeguard service integrity.

Proactive Service Assurance

• Carry out regular health checks and KPI monitoring.
• Conduct resilience and failure analysis.
• Engage with vendors for continual improvement initiatives.

Network Configuration Work

• Perform fraud barring for A and B numbers.
• Configure new number ranges on the Vodafone network.
• Support isolation of nodes from MSC for other teams.

Supplier & Third‑Party Management

• Support vendor issue resolution and track SLAs.
• Participate in compliance audits.

Change Management & New Service Introduction

• Ensure changes are implemented safely and efficiently.
• Follow testing, documentation, and governance protocols.

Software Rollout (LCM)

• Load new software in lab environments, progressing to live deployment post‑testing.

Knowledge Sharing & Training

• Facilitate knowledge transfer within the team and wider organisation.
• Provide guidance to less experienced colleagues and frontline teams.
• Maintain clear stakeholder communication.

Strong understanding of IMS architecture (CSCF, MTAS, HSS, SBC) and CS Core nodes (MSC, MGW).Skilled in telecom protocols such as SIP, Diameter, SS7, SIGTRAN.Experienced in VoLTE/VoNR call flows and IMS registration.Familiar with virtualisation platforms (VMware, OpenStack) and Linux systems.Capable of troubleshooting using tools and scripting (Python/Bash preferred).Comfortable working in high‑pressure, 24x7 operational environments.Effective communicator with strong collaboration abilities.Adaptable to emerging technologies including NFV, SDN, and Cloud IMS.Holds a Bachelor’s degree in Telecommunications, Electronics, or Computer Engineering.Possesses 8–12 years of experience in IMS and CS Core operations, ideally across multi‑vendor environments.Certifications such as CCNA/CCNP are preferred.

Concerned you may not meet every requirement? Vodafone is committed to creating an inclusive workplace where everyone can thrive. If you are excited about this role but your experience does not align exactly with every aspect of the job description, you are encouraged to apply. You may be the right candidate for this or another opportunity, and the recruitment team will support you in exploring where your skills fit best.

Opportunity to work on cutting‑edge IMS and CS Core technologies within a global telecommunications environment.Exposure to multi‑vendor systems and advanced network architectures.Collaborative work with cross‑functional teams and international partners.Opportunities to contribute to optimisation initiatives and service enhancement.Experience in end‑to‑end lifecycle management of network platforms.

Advanced troubleshooting across IMS and CS Core network elements.Hands‑on experience with virtualisation, NFV, SDN, and cloud‑based network solutions.Enhanced capability in change management and major incident handling.Strengthened analytical skills through KPI analysis and performance optimisation.Broadened expertise in vendor management and cross‑team collaboration.

Vodafone recognises and celebrates the value of diversity in building a workforce that reflects the customers and communities it serves. No form of discrimination is tolerated. This includes, but is not limited to, discrimination based on race, colour, age, veteran status, gender identity, gender expression, sexual orientation, pregnancy, maternity or parental status, ethnicity, disability, religion or belief, political affiliation, trade union membership, nationality, citizenship, indigenous status, medical condition, HIV status, neurodiversity, social origin, cultural background, marital or civil partnership status, or socio-economic background.

At Vodafone, we’re working hard to build a better future. A more connected, inclusive and sustainable world. As a dynamic global community, it's our human spirit, together with technology, that empowers us to achieve this.
We challenge and innovate in order to connect people, businesses, and communities across the world. Delighting our customers and earning their loyalty drive us, and we experiment, learn fast and get it done, together.
With us, you can be truly be yourself and belong, share inspiration, embrace new opportunities, thrive, and make a real difference.

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