5G Core and Critical Communications Lead Engineer (24‐mth FTC)
Lead 5G core and mission‐critical communications delivery for a major rail project, shaping the future of connected transport infrastructure.
Key Responsibilities
* Design and define 5G standalone core architecture supporting mission‐critical rail communications, including slicing, QoS and resilience strategies
* Translate operational rail requirements into clear technical specifications for mission‐critical voice, group communications and emergency services
* Oversee configuration of dedicated network bearers supporting train control and other safety‐critical systems
* Evaluate vendor solutions, providing technical assurance and recommendations across procurement and delivery phases
* Manage vendor relationships, ensuring compliance with specifications, standards and design expectations
* Lead integration across MCX platforms and rail subsystems including rolling stock, control centres and communications networks
* Develop and maintain detailed design documentation, test procedures and system artefacts across project stages
* Support testing, integration and acceptance activities, validating performance in live rail environments
* Provide guidance on technology evolution and future‐proofing critical communications capabilities
About the Candidate
You bring deep expertise in mobile core networks and critical communications, with the ability to lead complex system design in high‐stakes environments. You're confident navigating ambiguity, influencing vendors and stakeholders, and delivering robust, future‐ready solutions.
Key Qualifications
* Strong background in 5G standalone core architecture within private or enterprise networks
* Proven capability designing or integrating mission‐critical communication platforms (MCPTT, MCData, MCVideo), including voice and emergency services
* Solid understanding of IMS/SIP signalling and core network service‐based architecture
* Expertise in network slicing, QoS frameworks and priority bearer design for multi‐service environments
* Experience designing dedicated network architectures (including DNNs and traffic isolation strategies)
* Familiarity with integration across telecoms and operational systems, including rail, transit or similar critical environments
* Track record managing vendors across design, integration and delivery phases of complex programmes
* Ability to produce high‐quality engineering documentation and translate operational needs into technical solutions
Additional Qualifications
* A degree in Telecommunications, Engineering, Computer Science or a related discipline
* Extensive industry experience in telecoms or mobile network engineering, with exposure to core network design
* A collaborative mindset with strong communication skills and a passion for delivering impactful infrastructure solutions
Benefits & Culture
* Inclusive culture supported by a DEI strategy, Champion Network, Diversity Council membership and regular events
* Strong focus on development with a performance framework and LinkedIn Learning access
* Flexible work options, gender‐neutral parental leave, study and volunteer leave
* Recognition programs for high performance and peer appreciation
* Corporate discounts and novated leasing via SG Fleet
* A referral program that reflects our positive culture
BAI is committed to inclusive recruitment. If you need adjustments or alternative application options, please contact recruitment(at)baicommunications.com.
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