Senior Security Engineer in London

The Cyber Security Engineering Privileged Access Management team are looking for an independent, pro-active individual who is committed to making an important contribution, to deploy, configure, and maintain PAM platforms to protect privileged accounts and secrets across enterprise infrastructures and cloud services. As a Senior Security Engineer, you’ll focus on onboarding, operations, automation, and integrations under established architecture and standards. This role requires a strong focus on automation and reducing manual onboarding effort.

Key Responsibilities

• Implement and support core PAM features: account discovery/onboarding, credential rotation, policy configuration, and session management.
• Implement platform maintenance (patching, backups, DR testing), health checks, and performance monitoring; triage incidents and service requests.
• Integrate PAM with AD/EntraID, IDPs, ticketing/ITSM, CSPM, SIEM/SOAR, DevOps tooling (CI/CD), assist with workflows and approvals for elevated access.
• Develop automation scripts (PowerShell/Python) and REST API integrations to scale onboarding and reduce manual effort.
• Produce and maintain documentation: runbooks, SOPs, configuration baselines, and knowledge articles; supply compliance evidence.
• Collaborate with infrastructure, cloud, and security teams to ensure consistent controls and smooth deployments across environments.

Technical / job functional knowledge

• Hands-on experience operating at least one leading PAM platform (e.g., CyberArk, Delinea, BeyondTrust, One Identity).
• Proven understanding of Windows/Linux administration, AD/EntraID, networking and database basics, TLS/PKI, and identity integrations.
• Scripting proficiency (PowerShell/Python) and familiarity with APIs; exposure to Terraform/Cloud automation is a plus.
• Practical experience in enterprise support: troubleshooting, change management, and documenting fixes/runbooks.

Additional desired capabilities

• Exposure to endpoint privilege management, JIT access, secrets management for CI/CD, and container/Kubernetes integrations.
• Basic familiarity with SIEM tooling and alerting; security certifications or vendor badges are beneficial.

Diversity & Inclusion

People are at the heart of what we do and drive the success of our business. Our colleagues thrive personally and professionally through our shared values of Integrity, Partnership, Innovation and Excellence are at the core of our culture. We embrace diversity and actively seek to attract people with unique backgrounds and perspectives. We are always looking at ways to become more agile, so we meet the needs of our teams and customers. We believe that an inclusive collaborative workplace is pivotal to our success and supports the potential and growth of all colleagues at LSEG.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth. Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce. We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.