Senior Core Network Engineer

March Recruitment; Reading; On-site; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Holiday entitlement

Birthday leave

Pension scheme

Staff discount

Volunteering days

Subsidised staff restaurant

Onsite parking

Free shuttle bus

Job summary

March Recruitment is seeking an MCX Senior Core Engineer to provide expert support across IMS, 4G/5G Core, MCX and VoLTE, from design through operations. You will collaborate with R&D, customers and partners to deliver secure, reliable mission‑critical solutions, ensuring testing, performance and operational requirements are met.

You will lead testing, troubleshooting and integrations for MCX Core, driving tests, documentation and knowledge transfer to peers.

Qualifications

• Extensive experience across 4G/5G Core, IMS, VoLTE and Mission Critical Voice, Video and Data technologies.
• Strong knowledge of LTE, TETRA, 3GPP, IP networking and end-to-end troubleshooting.
• Experience with Wireshark, SIP, RTP/RTCP, Diameter, IXIA, Jira and ServiceNow; VMware Core deployments.
• Engineering degree or equivalent technical experience.

Responsibilities

• Provide SME support for defect triage, complex fault investigations and troubleshooting across MCX Core.
• Lead functional, performance and end-to-end testing, including software upgrades and regression testing on VNF/VMware Core solutions.
• Manage test progress, technical reports, trouble tickets and risks, ensuring issues are resolved within agreed SLAs.
• Support MCX Core integrations, providing technical analysis, logs and feedback to customers, partners and third parties.
• Contribute to MCX Core Test Strategies, Test Plans, documentation and the training and development of other engineers.

Skills

4G/5G Core

IMS

VoLTE

MCX knowledge

Troubleshooting

Leadership

Analytical skills

Education

Engineering degree

Tools

Wireshark

SIP

RTP/RTCP

Diameter

IXIA

Jira

ServiceNow

VMware

Job description

Location: Reading and customer offices as required

Duration: Ongoing

Hours: Monday–Friday, 9am–5:30pm

Overview of an MCX Senior Core Engineer

As an MCX Senior Core Engineer, you will provide technical expertise across IMS, 4G/5G Core, MCX, VoLTE, LTE and TETRA, supporting complex deployments from design through to operations. You’ll work closely with R&D, customers and partners to deliver secure, reliable mission‑critical solutions while ensuring testing, performance and operational requirements are met.

Responsibilities of an MCX Senior Core Engineer

• Provide SME support for defect triage, complex fault investigations and troubleshooting across MCX Core.
• Lead functional, performance and end-to-end testing, including software upgrades and regression testing on VNF/VMware Core solutions.
• Manage test progress, technical reports, trouble tickets and risks, ensuring issues are resolved within agreed SLAs.
• Support MCX Core integrations, providing technical analysis, logs and feedback to customers, partners and third parties.
• Contribute to MCX Core Test Strategies, Test Plans, documentation and the training and development of other engineers.

Key Competencies of an MCX Senior Core Engineer

• Extensive experience across 4G/5G Core, IMS, VoLTE and Mission Critical Voice, Video and Data technologies.
• Strong knowledge of LTE, TETRA, 3GPP, IP networking, routing protocols and end-to-end network troubleshooting.
• Experience with Wireshark, SIP, RTP, RTCP, Diameter, IXIA, Jira and ServiceNow, alongside VMware-based Core deployments.
• Excellent analytical, technical, communication and leadership skills, with an Engineering or equivalent technical degree/experience.
• Awareness of NIST, OWASP, GCF and UK TSA requirements, with willingness to support on‑call and travel to customer locations when required.
• Generous holiday entitlement, plus additional birthday leave and bank holidays.
• Staff sales discount, Reward Plus shopping discount, and volunteering days.
• Government pension auto‑enrolment and pension contribution from 12 weeks.
• Subsidised staff restaurant, onsite parking, and free shuttle bus service (from Weybridge & Woking Station)

Due to the large volume of applications we receive for each position we will only be able to respond to applications received with the relevant skills. Should you not hear from us within a week, unfortunately on this occasion your application has been unsuccessful.

March Recruitment is an equal opportunities employer and complies with all relevant UK legislation. Please note that by applying for this vacancy you accept March Recruitment’s Privacy Policy and GDPR Policy which can be found on our website and therefore give us consent to contact you.