[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Capgemini jobs](https://jobs.opennash.com/companies/capgemini/) · [Search jobs](/search/) Capgemini # Core Network Customer Technical Project Manager - IMS/VoLTE Lisboa - Expo, VNG - Cais Gaia, VNG - Lake Towers, Fundão, Évora Contract or temporary Manager or lead Operations Listed on Capgemini’s official careers site. Listed as of October 18, 2026. Check that it is still open and apply there. [Apply on Capgemini’s careers site →](https://www.capgemini.com/jobs/399068-en_GB+sap_btp) [OpenNash Jobs](https://jobs.opennash.com/) / [Capgemini](https://jobs.opennash.com/companies/capgemini/) / Core Network Customer Technical Project Manager - IMS/VoLTE ## Job description Capgemini EngineeringAt Capgemini Engineering, the world leader in engineering services, we bring together a global team of engineers, scientists, and architects to help the world’s most innovative companies unleash their potential. From autonomous cars to life-saving robots, our digital and software technology experts think outside the box as they provide unique R&D and engineering services across all industries. Join us for a career full of opportunities. Where you can make a difference. Where no two days are the same.Your RoleLead end-to-end deployment and integration of Interconnect Session Border Controllers (ISBC) across multi-operator and roaming environmentsManage projects involving IMS, VoLTE Core, Diameter/RADIUS platforms, and interconnect gatewaysCreate detailed migration and implementation plans aligned with customer and business requirementsCoordinate in-depth technical discussions with engineering teams, vendors, operations, and customer stakeholdersReview and validate Low-Level Designs (LLD), Method of Procedures (MOPs), rollback plans, test cases, and operational documentationEnsure all deployment and migration scenarios are fully tested in LAB and Production environmentsExecute migration activities with structured reporting to stakeholders and senior management, including daily and critical hourly updates when requiredDrive project planning activities, milestone tracking, risk management, and deployment governanceCoordinate with Design, Operations, and Delivery teams to ensure smooth rollout and operational readinessSupport compliance, audit, and quality assurance processes for telecom deployments and operational activitiesYour ProfileStrong hands-on experience with IMS Core, VoLTE architecture, SIP signaling, and telecom interconnect environmentsSolid expertise in Diameter and RADIUS platforms, roaming integrations, and telecom signaling protocolsProven experience deploying and integrating ISBC/SBC solutions in multi-vendor and multi-operator environmentsStrong understanding of telecom core network architecture, roaming services, and interconnect gatewaysExperience managing LAB validations, production deployments, migration execution, and rollback activitiesSkilled in preparing and reviewing technical documentation including LLDs, MOPs, test plans, and operational proceduresStrong stakeholder management and communication skills, with experience reporting to senior management and customer leadershipAbility to lead cross-functional technical discussions and coordinate complex deployment activities under tight timelinesExcellent project coordination, planning, and risk management capabilitiesComfortable working in international environments and collaborating with remote engineering and operations teamsWHAT YOU’LL LOVE ABOUT WORKING HEREJoin a multicultural and inclusive team environment.Enjoy a supportive atmosphere promoting work-life balance.Hybrid work.Your career growth is central to our mission. Our array of career growth programs and diverse professionals are crafted to support you in exploring a world of opportunities.Access valuable training and certifications in cutting-edge technologies.Engage in exciting national and international projects.Health and life insurance.Referral program with bonuses for talent recommendations.Great office locations. About CapgeminiCapgemini is the business transformation partner for enterprises in the age of AI. We help organizations imagine and build an intelligent, sustainable future, combining AI, technology and human ingenuity to transform how they operate, innovate and grow. With unique end-to-end capabilities spanning strategy, technology, engineering and intelligent operations, we bring together deep industry expertise and market-leading capabilities in AI, cloud and data to turn ambition into measurable business outcomes at scale. Supported by a robust ecosystem of partners and nearly 60 years of expertise, Capgemini is a responsible and diverse global organization of over 410,000 team members in more than 50 countries. ## At a glance - Posted by the employer: Not stated - First seen by OpenNash: Aug 1, 2026 - Last checked: Oct 18, 2026 - Listed for: 78 days - Location: Lisboa - Expo, VNG - Cais Gaia, VNG - Lake Towers, Fundão, Évora - Employment type: Contract or temporary[Apply on Capgemini’s careers site →](https://www.capgemini.com/jobs/399068-en_GB+sap_btp) ## More jobs at Capgemini ### [Packet core TPM](https://jobs.opennash.com/companies/capgemini/jobs/698b48cd99375458bd03/) Lisboa - Expo, VNG - Cais Gaia, VNG - Lake Towers, Fundão, Évora ### [Data Engineer AWS or GCP](https://jobs.opennash.com/companies/capgemini/jobs/c49c81e34309041c0590/) Lisboa - Expo, VNG - Cais Gaia, VNG - Lake Towers, Fundão, Évora ### [Market Services - CTPM/ Test Manager](https://jobs.opennash.com/companies/capgemini/jobs/6a4d099ae70bccdf6836/) Lisboa - Expo, VNG - Cais Gaia, VNG - Lake Towers, Fundão, Évora ### [(Senior) Cloud Engineer (w/m/d)](https://jobs.opennash.com/companies/capgemini/jobs/d69f11d66c5629168835/) Muenchen, Stuttgart, Koeln, Hamburg, Frankfurt, Nuernberg, Erfurt, Dortmund, Berlin, Ratingen, Ingolstadt, Wolfsburg ### [(Senior) Cloud Engineer (w/m/d)](https://jobs.opennash.com/companies/capgemini/jobs/93494e171d0dd1908f79/) Muenchen, Stuttgart, Nuernberg, Frankfurt, Hamburg, Duesseldorf ## Similar jobs at other companies ### [Core Network Engineer / Network Solution Architect](https://jobs.opennash.com/companies/ntt/jobs/c5bd50fdd6cd2e1ee0eb/) NTT · Milan, Italy ### [IP Core Network Specialist - PuneVOIS](https://jobs.opennash.com/companies/vodafone/jobs/111585cd69a40343a260/) Vodafone · Pune, Maharashtra, India ### [Technical Support Engineer - Windows Core (Device & Deployment, Performance & Reliability)](https://jobs.opennash.com/companies/microsoft/jobs/488e428a6253c524c562/) Microsoft · Japan, Tokyo-to, Tokyo ### [MS Technical Specialist – Network Security](https://jobs.opennash.com/companies/ntt/jobs/f19e7c62ac433219d5b4/) NTT · Mumbai, Mahārāshtra, India OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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