Job Description The role is a senior role within the Core Transport team in Three UK, which is responsible for providing subject matter expertise, leadership and guidance to business units across Three’s Network and Enterprise domains to enable the business to deliver its outcomes in a secure manner, building customer trust in a reliable network which matches the best, whilst ensuring compliance to regulatory requirements, company policy and standards. In this role you will have a broad and challenging remit, you will therefore need to be flexible and agile in your approach, switching between different security disciplines within the team as necessary. You will be engaging in the delivery of multiple business initiatives by introducing baseline and enhanced security requirements and supporting their implementation through guidance and advice. You will also be recommending network security solutions and then providing design input and technical approvals, assurances, and governance of deliveries that the project carries out with our colleagues and partners. Within the Core Transport team itself, as a senior member you will be expected to support the wider team by providing technical expertise and guidance, improving technical security standards, patterns and the team processes, as well as supporting the leadership team with resource and budget planning. You will be working with colleagues and partners to deliver Three’s outcomes and you will need to be able to successfully challenge and govern partner activities and have an awareness of partner contracts. What you will be doing in the role. Responsible for managing a team of 3-5 Technical Authorities in Network Security Infrastructure domain. Responsible for ensuring compliance of financial and commercial requirements for the domain. Responsible for defining and managing budgets for the domain. Responsible for providing delivery leadership for the domain, resolving complex problems and ensuring the domain services are delivered to agreed Time, Cost and Quality KPIS. Responsible for leading the delivery planning, risk and issue management. Responsible for developing and ensuring availability of adequate supply-chain required to design, build, test, deliver and operate the domain services. Responsible for managing senior stakeholders and internal/external communications. Responsible for liaising with the industry, other MNOs and support regulatory compliances. Responsible for mobilising delivery of new contracts/initiatives and leading sizable direct and virtual teams. Ensure the delivery of the solutions conforms to contractual outcomes and timescales Support the Programme and Project Manager in project planning, risk and issue management and the budgeting process Providing network security leadership to ensure that security requirements and outcomes are defined and considered throughout the lifecycle of projects from conception to operation. Collaborate closely with a broad range of stakeholders across the business and be able to articulate the security vision, principles and governance/assurance standards for security consultants and solution architects within Three and our partners. Provide effective governance and assurance of security deliverables by our partners and internal teams within Three, where necessary also supporting security consultants and solution architects through review and approvals. Ensure that there is effective capacity management and planning in place for the security services and solutions assigned to you and ensure that the solution is incorporated into the 18-month technical and budget roadmap for capacity expansion and service improvement. Support the leadership team in reporting, and roadmap and resource planning.