Location: North Greenwich, London - remote working - 50% office attendance model. Salary range £65,000 - £70,000 plus fantastic company benefits like final salary pension scheme, and free tube and bus travel. About us: As cyber threats continue to diversify and grow, so too does TfL's need to develop our cyber security culture and capabilities to ensure we continue to protect the services and systems which keep London moving. TfL's cyber security professionals play a critical and ever-increasing role in protecting these services and systems, safeguarding our customers as they travel across London's Transport network. About the role You will be the Subject Matter Expert for Microsoft Defender within the TfL Cyber Security Operations Centre (SOC), providing the skills needed to develop a world-class hunting capability across the organization. You will take the lead on deploying, managing, and optimizing the Microsoft Defender suite to help secure our enterprise infrastructure against today's evolving threat landscape. You will be responsible and accountable for defined aspects of the implementation and improvement of TfL's cyber security posture. This includes the identification and capture of requirements, engagement with stakeholders, the selection and delivery of solutions, and ensuring that solutions maintain their effectiveness in an ever-changing threat environment. This means you will work with colleagues in the Cyber Security and Incident Response Team, delivering TfL's cyber security strategy, as they continuously improve cyber security techniques that reduce the risk posed by cyber attack to TfL's information, systems and operations. Key accountabilities Develop best practices, documentation, and training to elevate our security posture. Provide leadership across the SOC, supporting Senior and Junior Analysts to prioritize and direct activities, driving behaviours and ensuring an effective and efficient incident handling. Serve as the go-to expert for all Microsoft Defender products, including Defender for Endpoint, Identity, Office 365, Cloud Apps, and Defender XDR. Enhancing TFL's operational capabilities within the team; working closely with the SOC Manager ensuring capabilities across all Security Service lines as well as ensuring best practice whilst driving continual improvement. Responsible for proactively monitoring TfL systems for malicious activity and intrusions using real time data and alerting from various data sources measured against agreed SLAs, designing and implementing advanced threat protection strategies using Microsoft security tools. Responsible for ensuring processes and operational documentation is maintained, fit for purpose and updated regularly to reflect changing business needs. Responsible for provide hands-on expertise in threat detection, incident response, and automation, in collaboration with key stakeholder across the organisation. Responsible for support the tuning of detection content and monitoring tooling to provide high fidelity alerting worthy of further investigation and mitigating false positives. Responsible for keeping up to date with current cyber developments and trends, and maintaining your skills through continuous personal development and working collaboratively with colleagues, both internal and external to the team to improve security operations and reduce risk. Skills Security Fundamentals training/certifications Incident Response training/certifications Conversant with technologies supported by the SOC and including experience with 4 or more (essential): IR, VM, TI, Phishing, SIEM, EDR, MDR. Demonstrable skills in using security tooling to provide contextual data to allow for a thorough assessment of an event. Ability to communicate effectively written and verbally and influence others in order to minimise TfL's Cyber Risk through effective monitoring, detection and where necessary mitigation Ability to effectively use a SIEM solution to identify events that warrant further investigation Ability to use Threat Intelligence to aid the detection of potential cyber security events and incidents. Knowledge Deep knowledge of Microsoft 365 Defender, Azure Defender (now Microsoft Defender for Cloud), and Microsoft Sentinel. Educated to Degree level or equivalent - industry recognised qualifications such as CEH, GCIH, GPEN, GDAT, CISSP and strongly preferred Microsoft Certifications SC-200, AZ-500) Knowledge of cyber security and information security controls best practice with supporting qualifications where possible - such as CompTIA Security+, Certified Ethical Hacker (CEH), Certified Information Systems Security Professional (CISSP), SANS and Microsoft Security Products. Knowledge of relevant legislation and government standards - including Security Policy Framework, Information Assurance Maturity Model, Security Essentials, Data Protection Act, Freedom of Information Act, EU Procurement Directives. A broad understanding of network and computer system architecture, operations and protocols. Understanding of information security management concepts to support solutions and processes. Experience 3-5+ years of hands-on experience with Microsoft Defender and the Microsoft Security stack. Proven experience in configuring policies, managing detections, and analysing threat signals. Experience of implementing and managing security monitoring and response in a complex organisation Experience of working in an operational environment such as a SOC, CSIRT or CERT function. Experience on leading the response to a Cyber Security incident or event Experience of mentoring junior analysts Strong understanding of MITRE ATT&CK, threat hunting, and incident management as well as NIST framework and how this can used to further improve security monitoring and detection. Knowledge of the Cyber Kill Chain Technical knowledge of computer network and systems and the necessary controls that can be used to prevent unauthorised access. Advert closes on Tuesday 5th August 2025 at 23.59 Excellent Benefits include: Final salary pension scheme Free travel for you on the TfL network Reimbursement of 75% of the cost of a standard class Ticket for National Rail travel from home or 75% reimbursement on a 28-day flexi ticket 30 days annual leave plus public and bank holidays TfL is committed to work-life balance, operating a hybrid working approach where business and role requirements allow Private healthcare discounted scheme (optional) Tax-efficient cycle-to-work programme Retail, health, leisure and travel offers Discounted Eurostar travel Additional Information Please apply supplying your CV preferably in “.docx” format. This document should be A4, in Arial 12 font, and a maximum of 2 pages per document. If you are shortlisted you may be invited to take part in a Video interview. We endeavour to give candidates as much notice as possible however some interviews/ assessments will be organised at short notice and will require a degree of flexibility. We reserve the right to close the application window early if we receive a high volume of suitable applications. Equality, diversity and inclusion We are committed to equality, diversity and inclusion. We want to represent the city we serve, which will help us become a more innovative and efficient organisation. Our goal is to make our recruitment as inclusive as possible. We are a disability confident employer who guarantee an interview to any disabled candidate who meets all of the essential criteria. We also use anonymising software that removes identifying information from CVs and cover letters to make the process fair. Many of our staff work flexibly in many different ways. Please talk to us at interview about the flexibility you need. We'll see what we can do. We understand a confidence gap can get in the way of meeting spectacular candidates. So please don't hesitate to apply if you think you have what it takes even if you feel you don't meet all the criteria. We'd love to hear from you. Greater London Authority. Location : Greenwich, South East London, United Kingdom
