Job Description

ABOUT US:
LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It's how we've contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services - and our open-access model - we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.
LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific. LSEG's ticker symbol is LSEG.
OUR PEOPLE:
People are at the heart of what we do and drive the success of our business. Our culture of connecting, creating opportunity and delivering excellence shape how we think, how we do things and how we help our people fulfil their potential. We embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions that make a difference. Our workplace generates an enriching and rewarding experience for our people and customers alike. Our vision is to build an inclusive culture in which everyone feels encouraged to fulfil their potential.
We know that real personal growth cannot be achieved by simply climbing a career ladder - which is why we encourage and enable a wealth of avenues and interesting opportunities for everyone to broaden and deepen their skills and expertise. As a global organisation spanning 70 countries and one rooted in a culture of growth, opportunity, diversity and innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with meaningful careers!!
ROLE SUMMARY:
You will be a highly experienced and hands-on Principal AWS Platform Engineer to join our dynamic Cloud Engineering security team. In this critical role, you will be a technical leader responsible for designing, implementing, and maintaining robust security solutions across our entire AWS cloud landing zone. You will drive security best practices, mentor junior engineers, and directly contribute to the secure delivery of our products and services. This is a hands-on role where you will be expected to write code, configure security tools, and work closely with cloud architects, platform and security engineers.
Key Responsibilities:Architect and Design: Lead or contribute to the design and implementation of secure AWS architectures, ensuring adherence to security best practices, industry standards (e.g., NIST, ISO 27001), and regulatory requirements. Implementation & Automation: Develop, deploy, and maintain automated security controls and infrastructure as code (IaC) using tools like CloudFormation, Terraform, or AWS CDK. Security Tooling: Select, implement, and optimize a wide range of AWS security services (e.g., GuardDuty, Security Hub, Inspector, WAF, KMS, Macie, Config, Organizations) and third-party security tools. Vulnerability Management: Establish and mature vulnerability scanning, penetration testing, and remediation processes for AWS environments and applications. Identity & Access Management (IAM): Design and enforce robust IAM policies, roles, and permissions across AWS accounts and applications, adhering to the principle of least privilege. Network Security: Securely configure AWS networking components (VPCs, Security Groups, NACLs, Transit Gateways) and integrate with network security solutions. Data Protection: Implement and enforce data encryption at rest and in transit and establish data loss prevention (DLP) strategies within AWS. Compliance & Audit: Ensure AWS environments are compliant with relevant industry regulations and internal security policies. Support internal and external audits. Mentorship & Leadership: Provide technical leadership, guidance, and mentorship to junior security engineers and development teams on AWS security best practices. Security Culture: Champion a strong security culture across the organization, promoting secure development practices and raising security awareness. Research & Innovation: Stay abreast of emerging AWS security threats, vulnerabilities, and technologies, recommending and implementing innovative solutions.
Qualifications:At least 5+ years focused on AWS cloud security in a hands-on capacity. Deep expertise in a wide range of AWS security services and their application in enterprise environments. Proven experience with Infrastructure as Code (IaC) tools such as Terraform. Strong proficiency in scripting languages (e.g., Python, Bash) for automation and security tool development. Extensive experience with AWS Identity and Access Management (IAM) principles and implementation. Solid understanding of network security concepts (firewalls, IDS/IPS, VPNs, WAF) within the AWS ecosystem. Experience with security information and event management (SIEM) tools and security orchestration, automation, and response (SOAR) platforms. Familiarity with compliance frameworks such as SOC 2, HIPAA, PCI DSS, GDPR, or ISO 27001. Excellent problem-solving, analytical, and communication skills. Ability to work independently and collaboratively in a fast-paced environment. Strong desire to remain hands-on with technology and actively contribute to technical solutions.
Preferred Qualifications:AWS Certified Security - Specialty certification Other relevant security certifications (e.g., CISSP, CISM, GSEC). Experience with container security (Docker, Kubernetes, EKS) and serverless security. Experience working within regulated financial businesses

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. You will be part of a collaborative and creative culture where we encourage new ideas and are committed to sustainability across our global business. You will experience the critical role we have in helping to re-engineer the financial ecosystem to support and drive sustainable economic growth. Together, we are aiming to achieve this growth by accelerating the just transition to net zero, enabling growth of the green economy and creating inclusive economic opportunity.
LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.
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. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.
Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it's used for, and how it's obtained, your rights and how to contact us as a data subject.
If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.