Job Description
What you’ll do
The Technical Design Authority (TDA) is accountable for the design and delivery of products and services within the Packet Core domain. The TDA will ensure all solutions are technically sound, meet business requirements, and align with the overall architectural strategy. Their responsibilities include defining technical standards, reviewing designs, and providing final approval before implementation. The Data Services domain provides engineering leadership for platforms that enable IP connectivity, signalling, mobility, and interworking between the operator’s network and external partners, roaming networks, and the internet.
* Drive the technical strategy, roadmap, and lifecycle management of Signalling and Mobility platforms (SGSN, MME/AMF,DRA/DEA DNS/DHCP interconnect gateways[SG1] ).
* Drive the evolution for 4G/5G mobility evolution, including transition to cloud-native signalling and mobility management.in line with 5G core architecture.
* Ensure signalling and mobility platforms support commercial growth, new services (e.g. IoT, enterprise mobility, private networks), and roaming expansion.
* Oversee design, build, integration, and acceptance of signalling/mobility platforms into the live network.
* Manage lifecycle of platforms, ensuring capacity, resilience, and security are continuously optimised.
* Manage Data Core network Dimensioning and Capacity Management processes for signalling and mobility Applications
* Drive automation, virtualisation, and simplification initiatives to reduce cost and improve agility.
* Ensure timely delivery of projects and alignment with cross-functional programs (e.g. Core, Transport, Security).
* Partner with Operations and Service Management to maintain high availability, stability, and incident responsiveness across signalling domains.
* Proactively identify risks (e.g. roaming disruptions, signalling storms, cybersecurity threats) and implement preventive measures.
Qualifications
Who you are
* Working knowledge of 3G, LTE & 5GSA data networks on an end-to-end basis.
* In-depth knowledge of signalling protocols and mobility systems:
* Proven experience with 4G/5G Core and mobility management (AMF, SMF, MME, DRA/DEA).
* 10+ years in telecoms network engineering, with significant focus on signalling/mobility.
* Demonstrated success in delivering complex core network transformation programs.
Worried that you don’t meet all the desired criteria exactly?
We know that everyone is unique, with multiple aspects to their identity and different experiences behind them. We are passionate about Inclusion for All and creating a workplace where everyone can thrive, whatever their personal or professional background. If you’re excited about this role but your experience doesn’t align exactly with every part of the job description, we encourage you to apply as you may be the right candidate for this role or another role, and our recruitment team can help you see how your skills fit in.
Additional Information
What we offer
We care about our people’s success by offering great pay, bonuses, up to 28 days off plus bank holidays, and paid time for charity work. You can personalise our benefits for you and your family, like discounts, vouchers, a pension plan and loads more. We help with your career through our amazing learning tools and top-notch parental leave policies.
Need to know
We are regulated by the Financial Conduct Authority and all offers of employment for this role are subject to background checks, including criminal (DBS) and financial checks to meet the regulators standards.
We believe everyone should have the opportunity to interview for a role that matches their skills. In collaboration with our Talent, Diversity & Inclusion teams and our employee-led DEI Networks, we identified a range of reasonable adjustments to help you feel comfortable and perform at your best self during the interview process. If you require any reasonable adjustments or have an accessibility request as part of your recruitment journey, for example, extended time or breaks in between online assessments, a sign language interpreter, or assistive technology, please contact your recruiter directly or email jobs@three.co.uk for guidance.
We use AI in different parts of our business to boost innovation, improve efficiency, and create new opportunities. We know many candidates use AI to fine-tune their CVs or prepare for interviews, but what we really care about is your unique experiences and achievements.
During the interview, we want you to rely on your own knowledge and skills to show us who you really are—your personality, creativity, and abilities. Above all, we’re looking for authenticity and can’t wait to get to know the real you.
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