Network Test Analyst - OCS

Capgemini Engineering; Newbury; On-site; GBP 45,000 - 65,000; Full time

Job summary

Capgemini is seeking a Network Test Analyst - OCS to support requirements analysis, test planning, scheduling and execution at Newbury. The role involves failure analysis, defect management and delivering comprehensive test reports to customers.

The candidate should have strong SIP, Diameter and RTP knowledge, hands-on CS/IMS and 5G SA call flows, plus experience with OpenText ALM and Nokia NCC OCS. An onsite, five-days-per-week arrangement is expected.

Qualifications

• Strong knowledge on 2G, 4G and 5G SA technologies.
• Working knowledge in Charging systems - OCS, 5g-CHF, 5g-CCS (NCC experience preferred)
• Interfaces related to Charging components - Diameter GY/GX/SY, N40/N7/N28, SIP, etc.
• Core Network – Voice and Data Core
• Core network elements - MSC, MGW, HLR, HSS, SBC, IMS (TAS and CSCF), UDM, AMF, SMF, PCF, CCS, PCC and PCG, CDR and AMA Specification.
• Strong protocol knowledge in SIP, Diameter, RTP, MEGACO, HTTP, GSM MAP and SS7/SIGTRAN.
• Hands-on CS, IMS (VoNR/VoLTE/VoWiFi) and 5G SA call flows.
• Responsible for issue reproduction , Verification and Validation of fix provided.

Responsibilities

• Support requirements analysis and test planning.
• Lead test scheduling and test execution activities.
• Perform failure analysis and defect management.
• Provide comprehensive test reports to customers.
• Coordinate with cross-functional teams to ensure test coverage.

Skills

2G/4G/5G SA

OCS/5G-CHF/5G-CCS

Diameter GY/GX/SY

Core Network Voice/Data

IMS/CS/VoNR/VoLTE/VoWiFi

SIP/Diameter/RTP

Issue reproduction/verification

Tools

Wireshark

OpenText ALM

Nokia NCC OCS

Job description

Capgemini is seeking a Network Test Analyst - OCS to support requirements analysis, test planning, test scheduling, and test execution. The role involves conducting failure analysis, managing defects, and providing comprehensive test reports to customers.

Your profile

Mandatory Skills :

• Strong Knowledge on 2G, 4G and 5G SA technologies.
• Working knowledge in Charging systems - OCS, 5g-CHF, 5g-CCS (NCC experience preferred)
• Working knowledge with interfaces related to Charging components - Diameter GY/GX/SY, N40/N7/N28, SIP, etc.
• Working knowledge in Core Network – Voice and Data Core
• Working knowledge in Core network elements - MSC, MGW, HLR, HSS, SBC, IMS (TAS and CSCF), UDM, AMF, SMF, PCF, CCS, PCC and PCG, CDR and AMA Specification.
• Strong protocol knowledge in SIP, Diameter, RTP, MEGACO, HTTP, GSM MAP and SS7/SIGTRAN.
• Hands-on experience in CS, IMS (VoNR/VoLTE/VoWiFi) and 5G SA call flows.
• Responsible for issue reproduction , Verification and Validation of fix provided.

Preferred Skills:

• Basic knowledge in IP and Network provisioning systems.
• Troubleshooting and debugging skills using tools like Wireshark
• Hands-on experience with Nokia NCC OCS, Surepay OCS and CDR and AMA Specification
• Quality Management Tools: OpenText ALM.

Make it real - what does it mean for you?

• Open access to digital learning platforms
• Active employee networks promoting diversity, equity and inclusion like OutFront, CapAbility or Women@Capgemini

Capgemini is proud to be a Disability Confident Employer (Level 2) under the UK Government’s Disability Confident scheme. As part of our commitment to inclusive recruitment, we will offer an interview to all candidates who:

• Declare they have a disability, and
• Meet the minimum essential criteria for the role.
• Please opt in during the application process.

Capgemini. Make it real.

Need to know

• All roles will require a level of security clearance; BPSS OR Security ClearanceOR Developed Vetting.
• This is an onsite role requires 5 days/week office presence based in Newbury.
• You can bring your whole self to work. At Capgemini building an inclusivefuture is part of everyday life and will be part of your working reality. We havebuilt a representative and welcoming environment, for everyone.

About Capgemini

Capgemini is an AI-powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organisations and make it real with AI, technology and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of over 420,000 team members in more than 50 countries. We deliver end-to-end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations. The Group reported 2025 global revenues of €22.5 billion.