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LSEG (London Stock Exchange Group)

IT Security Officer

Hybrid

Paris, France

Mid level

Full Time

27-12-2025

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Skills

Communication Teamwork Adaptability Python Perl Network Security Risk Management Encryption Cloud Security Monitoring VMware Problem-solving Databases

Job Specifications

Job Title: IT Security Officer - LCH SA

Role summary

Do you have a passion for cybersecurity & technology? Do you want to make a difference, delivering Cyber Security within some of the biggest companies in the world and a critical player in the Financial markets industry as a CCP (clearing house)?

We are seeking a skilled IT Security SecOps to join LCH SA IT Security team located in Paris. This role aims at securing LCH SA IT infrastructure and Business application, controlling protection & detection systems, and managing cybersecurity incidents in coordination with Security Operations Centre, to ensure LCH SA Information System is secure, resilient, scalable, and highly available. The ideal candidate will have experience in all key aspects of the cyber security framework and related to vulnerability management, cyber incident management, identity and privileged access management, cyber security service management (reporting & dashboards KPI / SLA).

Key responsibilities and accountabilities:

Deliver the LCH SA cyber security controls’ library by performing checks on the pillars based on the NIST framework (Identify, Protect, Detect, Respond and Recover),
Assess and challenge the LCH SA cyber security controls performed by the outsourcers,
Deliver cyber security service activities within LCH SA, in particular production and monitoring of SLA and KPI related to controls activities,
Oversee the outsourced cyber security services with the outsourcers,
Provide support / expertise to other IT Security officers in charge of controls’ execution & assessment.

What you'll be doing:

Delivery of Cyber security controls: Perform cyber security checks to ensure that there are no gaps in the LCH SA cyber security posture (anti-malware coverage, Firewall rules recertification, outstanding vulnerabilities without remediation etc.)
Enhancement of cyber security controls: Automate some controls by scripting (Python, Perl etc.) to enhance the delivery of the controls (reconciliation between different data sources etc.)
Assessment of security controls: Assess the outcomes of controls performed by LCH SA outsourcers
Reporting: Provide providing with SLA and KPI related to controls’ delivery and related identified gaps.
ITIL cyber security management: Review and challenge the changes, the closure of problems etc. (tech / Business) which may impact on the cyber security profile of the CCP.

You'll bring:

Education
Bachelor’s degree in computer science, Engineering, or a related field (or equivalent experience).
Professional experience
At least 5 years as a Security Engineer, or similar role, with a focus on controlling Security and Tech solutions in regulated and highly available environment.
An experience as IT / Cyber auditor will be a plus.
Cyber security certification will be a plus such as CISSP, GIAC etc.
Fluent English mandatory, in a context of cooperation across an international Group.
Mandatory Technology Expertise
Network Security
OS / Databases / Middleware / Applications Security
VMware Cloud Security
Secret Management
Encryption
Vulnerability Management
EDR/AV
IAM/PAM
SIEM / SOC
Soft Skills
Good communication
Teamwork and collaboration
Problem-Solving
Adaptability

About London Stock Exchange Group (LSEG)

LSEG’s vision is to be the most trusted authority in global financial markets. This is achieved through leading the world in providing access to capital, helping customers optimise capital resources and promoting trusted and open environments and services for investment.

LSEG is a diversified international exchange Group that sits at the heart of the world's financial community. The Group operates through four key business divisions: Capital Markets (broad range of international equity, bond and derivatives markets); Post Trade (post trade and risk management services); Global Technology Services (trading platforms and capital markets software); and Information Services (real-time and reference data products).

As a global business, LSEG relies on diversity of culture and thought to deliver on our goals. Therefore we seek hardworking, qualified employees in all our operations around the world−regardless of race, colour, sex/gender, including pregnancy, gender identity and expression, national origin, religion, sexual orientation, disability, age, marital status, citizen status, veteran status, or any other protected classification under country or local law. LSEG makes reasonable accommodations for applicants and employees with disabilities. If an accommodation is needed to participate in the job application or interview process, to perform crucial job functions, and/or to receive other benefits and privileges of employment, please contact us to request an accommodation.

Career Stage:

Senior Associate

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a

About the Company

LSEG (London Stock Exchange Group) is a diversified international markets infrastructure business —earning our clients’ trust for over 300 years. That legacy of customer-focused excellence ensures that you can rely on our expertise in capital formation, intellectual property and risk and balance sheet management. As global leaders in financial indexing, benchmarking and analytic services, we offer unrivalled access to international capital markets. Our high-performance technology solutions enable companies worldwide to acc... Know more