Director of Security & Privacy

WPP is the trusted growth partner for the world’s leading brands.  We unite cutting-edge media intelligence and data solutions, world-class creativity, next-generation production, transformative enterprise solutions and expert strategic counsel in a single company – powered by exceptional talent and our agentic marketing platform, WPP Open, to help our clients navigate change, capture opportunity and deliver transformational growth.    We work with the world's most valuable brands and have global reach across 100+ markets, with deep local expertise.   Our people are the key to our success. We're committed to fostering a culture of creativity, belonging and continuous learning, attracting and developing the brightest talent, and providing exciting career opportunities that help our people grow.    For more information, visit WPP.com.   Why we're hiring: We're looking for a Business Security Services Director to partner with one of WPP's most strategically important technology platforms. This role will act as the dedicated security leader for WPP Open — our AI-powered marketing and business operating platform — helping ensure that security, trust, resilience and client assurance are embedded into how the platform evolves and scales. Working at the intersection of platform security, product security, AI risk and client trust, you'll collaborate closely with product, engineering, AI and operational teams to shape security outcomes across a high-growth, highly innovative environment. This is an opportunity to influence how one of WPP's most important technology investments manages security at scale while enabling innovation and business growth. What you'll be doing: Security Leadership & Business Partnering * Act as the primary security partner for WPP Open. * Build strong relationships across product, engineering, AI and architecture teams. * Translate enterprise security strategy into practical platform-specific outcomes. * Champion security as an enabler of innovation rather than a barrier to delivery. * Represent WPP Open within broader security governance and leadership forums. Product & AI Security * Partner with product and engineering teams to strengthen secure software development practices. * Support the ongoing evolution of platform, application and API security controls. * Help shape the governance and assurance of AI-enabled capabilities and agentic workflows. * Drive a risk-based approach to emerging challenges including AI misuse, prompt abuse and data protection. Client Trust & Security Assurance: * Help ensure robust controls around client data protection, segregation and confidentiality. * Support client assurance activities and security commitments for some of the world's leading brands. * Partner with internal stakeholders to maintain trust and confidence in WPP Open's security posture. Identity, Resilience & Risk: * Support the evolution of modern identity and access security models across the platform. * Contribute to platform resilience, continuity planning and recovery readiness. * Work closely with cyber incident response teams on security events, investigations and risk management activities. * Help define and communicate security metrics, risk indicators and platform security trends to senior stakeholders. What you'll need: * Significant experience in cyber security, product security, platform security or business-aligned security leadership roles. * Experience partnering with engineering, product and business teams in fast-moving technology environments. * Strong understanding of security challenges associated with cloud-native platforms, SaaS products and modern software delivery. * Knowledge of areas such as AI security, identity and access management, API security, client data protection and platform resilience. * Excellent stakeholder management, communication and influencing skills. * A pragmatic approach, balancing security requirements with product innovation and business objectives. Nice to Have * Experience securing AI-enabled products, platforms or digital services. * Familiarity with recognised security frameworks such as ISO 27001, ISO 42001, SOC2, NIST AI RMF or OWASP AI Top 10. * Experience working with cloud environments including Azure, AWS or Google Cloud. * Security certifications such as CISSP, CISM, CCSP or equivalent. Who you are: You're open: We are inclusive and collaborative; we encourage the free exchange of ideas; we respect and celebrate diverse views. We are open-minded: to new ideas, new partnerships, new ways of working. You're optimistic: We believe in the power of creativity, technology and talent to create brighter futures or our people, our clients and our communities. We approach all that we do with conviction: to try the new and to seek the unexpected. You're extraordinary: we are stronger together: through collaboration we achieve the amazing. We are creative leaders and pioneers of our industry; we provide extraordinary every day.   What we'll give you: Passionate, inspired people – We aim to create a culture in which people can do extraordinary work. Scale and opportunity – We offer the opportunity to create, influence and complete projects at a scale that is unparalleled in the industry. Challenging and stimulating work – Unique work and the opportunity to join a group of creative problem solvers. Are you up for the challenge? #LI-Hybrid  We believe the best work happens when we're together, fostering creativity, collaboration, and connection. That's why we’ve adopted a hybrid approach, with teams in the office around four days a week. If you require accommodations or flexibility, please discuss this with the hiring team during the interview process. WPP is an equal opportunity employer and considers applicants for all positions without discrimination or regard to particular characteristics. We are committed to fostering a culture of respect in which everyone feels they belong and has the same opportunities to progress in their careers. PLEASE READ OUR PRIVACY NOTICE (HTTPS://WWW.WPP.COM/EN/CAREERS/WPP-PRIVACY-POLICY-FOR-RECRUITMENT) FOR MORE INFORMATION ON HOW WE PROCESS THE INFORMATION YOU PROVIDE.

About us We are champions of rail, inspired to build a greener, more sustainable future of travel. Trainline enables millions of travellers to find and book the best value tickets across carriers, fares, and journey options through our highly rated mobile app, website, and B2B partner channels.  Great journeys start with Trainline 🚄  Now Europe’s number 1 downloaded rail app, with over 135 million monthly visits and £6.3 billion in annual ticket sales, we collaborate with 270+ rail and coach companies in over 40 countries. We want to create a world where travel is as simple, seamless, eco-friendly and affordable as it should be.  Today, we're a FTSE 250 company driven by our incredible team of over 1,000 Trainliners from 50+ nationalities, based across London, Paris, Barcelona, Milan, Edinburgh and Madrid. With our focus on growth in the UK and Europe, now is the perfect time to join us on this high-speed journey.  Introducing Machine Learning and AI at Trainline 👋 Machine learning and AI are central to how Trainline helps millions of customers make smarter, more sustainable travel choices every day. Our ML models and AI systems power critical parts of the platform - from search and recommendations to pricing intelligence, personalisation, digital marketing, and AI-driven customer support. Our ML teams own the full delivery lifecycle, from ideation through to production. We work closely with stakeholders across the business to expand the reach and impact of ML and AI throughout Trainline. The Role This is a senior leadership role sitting within one of Trainline’s most important product areas: Core Experience. This pillar encompasses the products and systems closest to the customer journey - search, pricing, payments, fare intelligence, and conversational interfaces. You will define and lead the ML strategy, team, and delivery across this domain. That means building and scaling ML and AI capabilities that measurably improve the customer experience and drive business outcomes. The work spans traditional ML systems and emerging agentic/LLM-based capabilities. You will lead multiple ML teams through their respective team leads, reporting to the Director of AI & ML. You’ll be accountable for the people (2 ML Managers and ~10 ICs), delivery, and budget across your pillar - including vendor and infrastructure cost management. You’ll work closely with Product, Engineering, Data, Analytics, and commercial stakeholders, combining strategic thinking, technical leadership, and organisational leadership to ensure Trainline continues to ship high-quality, scalable ML systems in production. As a Head of Machine Learning - Core Experience at Trainline you will... 🚄 * Set direction and own the budget. Define the vision, strategy, and roadmap for ML across the Core Experience pillar. Own the pillar’s budget - including cloud infrastructure, vendor costs, and third-party tooling - balancing short-term delivery with longer-term platform investments. * Lead and grow the organisation. Lead multiple teams through their team leads. Coach managers and senior ICs, set hiring strategy, and build a culture of technical excellence, experimentation, and delivery. Partner closely with Product, Engineering, and commercial stakeholders to identify high-value opportunities and raise adoption of ML across the business. * Deliver and operate. Drive delivery across search relevance, payments models, splits and fare optimisation, supply automation, and conversational AI. Ensure your teams ship end-to-end - from prototyping through deployment, monitoring, and iteration. Raise operational maturity by defining SLIs/SLOs, incident management, and on-call practices for ML systems in production. * Shape AI practices and governance. Co-own the operating model for modern AI at Trainline - LLM-based features, agentic systems, evaluation frameworks, and guardrails. Drive improvements in AI governance, data privacy, security, and audit accountability as capabilities scale. We'd love to hear from you if you have...🔍 * Significant experience building and leading production ML teams, including managing through team leads (manager-of-managers) * Strong track record of shipping ML systems that deliver measurable business or customer impact, across problem types such as ranking, recommendation, forecasting, optimisation, or real-time decisioning * Deep understanding of the full ML lifecycle and strong software/platform instincts - you know what it takes to run reliable ML at scale – including MLOps tooling and practices * Experience raising operational standards: SLIs/SLOs, monitoring, incident management, and production reliability * Budget ownership, including infrastructure cost management and vendor oversight * Comfortable operating at both strategic and technical levels, with strong stakeholder and communication skills * Experience hiring, mentoring, and developing technical talent at multiple levels Nice to have 😍 * Experience with AWS cloud infrastructure * Experience with cross-functional delivery in product-led organisations * Experience deploying conversational and agent-based systems in customer-facing products * Experience in travel, transport, marketplaces, or similarly complex digital platforms Our technology stack 💻 * Python and associated ML / DS libraries (scikit-learn, NumPy, LightGBM, Pandas, LangChain/LangGraph, TensorFlow, etc.) * PySpark * AWS cloud infrastructure: EMR, ECS, Athena, etc * MLOps / DevOps: Terraform, Docker, Airflow, MLFlow * Monitoring and evaluation platforms including New Relic and Braintrust More information: Enjoy fantastic perks like private healthcare & dental insurance, a generous work from abroad policy, 2-for-1 share purchase plans, an EV Scheme to further reduce carbon emissions, extra festive time off, and excellent family-friendly benefits.  We prioritise career growth with clear career paths, transparent pay bands, personal learning budgets, and regular learning days. Jump on board and supercharge your career from day one!  We're operating a hybrid model and ask that Trainliners work from the office a minimum of 60% of their time over a 12-week period. We also have a 28-day Work from Abroad policy. Our values represent the things that matter most to us and what we live and breathe everyday, in everything we do:  * 💭 Think Big - We're building the future of rail  * ✔️ Own It - We focus on every customer, partner and journey  * 🤝  Travel Together - We're one team  * ♻️ Do Good - We make a positive impact  We know that having a diverse team makes us better and helps us succeed. And we mean all forms of diversity - gender, ethnicity, sexuality, disability, nationality and diversity of thought. That's why we're committed to creating inclusive places to work, where everyone belongs and differences are valued and celebrated. Interested in finding out more about what it's like to work at Trainline? Why not check us out on LinkedIn, Instagram and Glassdoor!