About Man Group

Man Group is a global alternative investment management firm focused on pursuing outperformance for sophisticated clients via our Systematic, Discretionary and Solutions offerings. Powered by talent and advanced technology, our single and multi-manager investment strategies are underpinned by deep research and span public and private markets, across all major asset classes, with a significant focus on alternatives. Man Group takes a partnership approach to working with clients, establishing deep connections and creating tailored solutions to meet their investment goals and those of the millions of retirees and savers they represent.

Headquartered in London, we manage $253.6 billion* and operate across multiple offices globally. Man Group plc is listed on the London Stock Exchange under the ticker EMG.LN and is a constituent of the FTSE 250 Index. Further information can be found at www.man.com

At Man Group, we respect your privacy and we are committed to protecting and safeguarding your Personal Data. We have developed policies and processes which are designed to provide for the security and integrity of your Personal Data. We are committed to Processing your Personal Data fairly and lawfully, and being open and transparent about such Processing. For further information on how we process your data, please see the privacy notice for applicants here.

* As at 30 June 2026

The Team

Man Group’s business is powered by sophisticated technology with AI accelerating the next generation of transformation. Our technology stack is built on modern open-source components, both enabling day-to-day research and development, and supporting our 24hr trading.

With adoption of AI-agents we are investing in security as a first-class concern. Man has a sophisticated AI platform – MAIA – that offers the best foundation models on our modern technology stack. As agents become more powerful, the security platform which supports safe agentic workflows is critical.

The Senior Security Engineer will build and run the components that put these principles into practice: a policy engine and APIs that allows applications, AI agents and users to authenticate. This infrastructure will support authorisation with scoped short-lived credentials. This is a hands-on engineering role, securing Man's applications and services.

Role Responsibilities

Platform Engineering

Design, build and operate security platform services and APIs such as policy decision, just-in-time access and short-lived credential issuance.
Write and maintain policy-as-code that is tested, version-controlled and deployed through GitOps.
Integrate the platform with identity providers (Entra/AD), secrets management (Vault) and existing internal infrastructure (Keycloak, Sailpoint).
Run services to production standards for reliability, performance and observability, including 2nd line on-call support.

Enablement and Detection

Provide Python APIs and onboard application teams and AI-agent developers to the platform, with documentation that make the secure path the easy one.
Build logging, metrics and alerting for platform services, and contribute SIEM detection rules.

Key Competencies

Required

Hands-on experience building and operating production services with Python.
Using Kubernetes, Linux and containerised environments, including networking fundamentals and performance troubleshooting.
Solid understanding of authentication, authorisation and secrets management (OIDC/OAuth, Azure AD/Entra ID, vault technologies).
Experience with infrastructure-as-code (e.g., Terraform, Ansible, Helm) and GitOps-based deployment.
Working knowledge of observability stacks (e.g., ELK, Prometheus, Grafana), including building dashboards and alerting rules.
Clear communication and a structured approach to reasoning about risk.

Desirable

Kubernetes knowledge beyond basic usage: network policies, pod security standards, admission controllers and resource quota enforcement.
Policy engines and workload identity (e.g., OPA/Rego, Kyverno, Cedar, OpenFGA, SPIFFE/SPIRE, Envoy/service mesh).