Senior Infrastructure Security Engineer

Senior Infrastructure Security Engineer - 12 Month FTC Join to apply for the Senior Infrastructure Security Engineer - 12 Month FTC role at PXC. We are PXC, the UK’s largest provider of wholesale connectivity. Our vision is to be the UK’s #1 wholesale platform, a one‑stop shop provider of connectivity, voice, cloud and security underpinned by the UK’s most robust, secure, resilient and reliable network. Born from the combination of Virtual1 and TalkTalks wholesale services and national network business, we operate across our three core sites (Salford, London and Skopje, North Macedonia). Our mission is clear, to be the UK’s best company to work for and best to work with. We believe this success is driven by the power of our employees. We empower our people to become true experts in their field who embody our values every day: we care; we challenge; we commit. About the Team: The Public Cloud Team is responsible for producing high‑level conceptual and low‑level designs, delivering the build of those designs, and ensuring that solutions are supportable when transitioned into run support. The team applies functional knowledge and technical expertise to deliver and maintain systems which ensure that PXC network remains secure and reliable against today’s threats. The team consists of technical experts in Technology and Security, who work as part of the wider Security business unit and align to the strategic objective of continuous improvement of NIST‑based Security Maturity. Working as part of the wider Cloud Infrastructure team to ensure our Public Cloud Infrastructure is fit for purpose, meets best practice and is secure and available. About the Role: As Senior Infrastructure Security Engineer you will own, manage, support, and maintain the security infrastructure that empowers our staff, along with the security tooling which protects it. You will work to deliver secure, stable and scalable solutions, ensuring any developments to the group’s Cloud strategy align with the wider business strategy and security requirements of the TalkTalk Group. As part of the wider team Public Cloud Services Team, you will work across all our technologies and with teams from all areas of the business. You will act as first point of contact and help guide users to an appropriate solution. You will help ensure a cloud‑first, secure by design approach to everything delivered by the Public Cloud Services Team. Day‑to‑Day Security Build and Maintenance Build and support physical and virtual security infrastructure to ensure stable and reliable services. Deliver on project requirements to ensure TalkTalk network and security standards are upheld. Maintain security equipment across the office, datacentres, and cloud, ensuring devices remain secure, patched, and fit for purpose. Manage all Security assets ensuring everything is accounted for, in life and up to date. Manage the end‑to‑end life cycle of Security equipment. Work overtime for out of hours changes and on call for out of hours support where required (paid). Security BAU Manage the Security Engineering case queues, ensuring tickets are responded to and closed within SLA. Provide top‑tier support to all Security customers. Act as triage for incoming 3rd line incidents and requests. Administrate security tooling, including reporting on, and actioning any potential threats to security or service. Be accountable for work delivered, ensuring all work is in line with TalkTalk security and network standards. Perform changes to the security systems in a stable and suitable manner, following change management processes. Help to perform root cause analysis and problem management on Major Incidents and repeat tickets. Communication Collaborate with teams across TalkTalk group on risks, improvements, best practices and better understand their challenges. Challenge colleagues on projects and tickets that do not meet our standards or could lead to security vulnerabilities or support issues. Collaborate with Business Partners and offshore partners to resolve incidents, validate and plan technical change and problem management, to ensure a high level of support to TalkTalk. Interact and coordinate with peers, vendors, suppliers and consultants and work with incident, change and problem management teams as required. Security Architecture Contribute to the adoption of principles, patterns, standards, and guidelines that direct the selection, development, implementation, and use of technology within the team’s domain. Work with management to create and maintain the technology roadmap for the technologies in use by Public Cloud Services, with consideration for future architecture direction requirements. Understand and influence the return on investment and value gain from chosen technologies, by working in partnership with other business areas. Recognise improvement requirements and drive priorities forward. Ensure all equipment and tooling used by Public Cloud Services has appropriate security patching. Technology Desire for continuous development of their own technical knowledge from the wider telecommunications and IT industry to ensure adoption of best practice and help to evolve the TalkTalk architecture strategy. Drive to ensure best practice and build on new and existing processes to ensure efficiency and resilience. Demonstrate experience of building, maintaining, and supporting complex enterprise networks. Knowledge and experience of multi‑cloud networks and SaaS applications would be advantageous. Able to understand and articulate high‑level designs and detailed low‑level documentation, and complex network diagrams. Understand and demonstrate experience working with security technology suites from various vendors (F5, Netskope) and in technology‑specific areas (WAF, Web Gateways, PAM, etc.). Be comfortable with technology compliance and governance. Be familiar with asset management, monitoring, logging, backups, remote access, etc. Essential A strong background in networking and security and understanding of security best practices within large complex infrastructure. Hands‑on experience in the administration and configuration of Security products. Build, maintain and support mission‑critical network and security platforms. A good understanding of security technologies e.g., WAF, Securing Hybrid Cloud platforms, SIEM, SWG, ZTNA, PAM. Excellent problem‑solving skills and attention to detail. Desirable Hands‑on knowledge of ISO, PCI/DSS, NIST, Cyber Essentials and other relevant security standards. How we look after our employees Our brand new PXC Flex benefit launched in January 2025, which includes Flex30, an additional 30 hours of leave each year for you to use how you wish. Our hybrid working policy offers you flexibility to work from home as well as connect with your colleagues in one of our accessible and collaborative office spaces. A starting holiday allowance of 25 days, plus up to 10 extra days via our holiday purchase scheme. Free private healthcare for all employees, a competitive pension scheme and the opportunity to earn a bonus. Free broadband for all employees plus gifts for major life events such as marriages and births. Flexible salary sacrifice scheme including dental, gym plus a huge range of shopping and leisure discounts so you can save even more cash. A range of inclusive employee networks to help integrate employees into life at PXC. (* Days and hours are based on a full‑time employee’s working pattern and leave is pro‑rated for part‑time employees) At PXC, we know that diversity means success and innovation. We want our workplace to reflect the communities and customers we serve. Being inclusive is part of our DNA; we are all 100% human, and we create a culture where you can truly be yourself. We’re also not your usual 9‑5. We are a dynamic workplace and we want to talk to you about how you like to work. Seniority level Mid‑Senior level Employment type Full‑time Job function Information Technology Industries Data Infrastructure and Analytics Referrals increase your chances of interviewing at PXC by 2x. #J-18808-Ljbffr