Entra Identity Security Engineer — Zero Trust & Automation

Willis Towers Watson; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Hybrid work model

Private healthcare

Pension scheme

Volunteer day

Share scheme

Job summary

Willis Towers Watson is seeking a Senior Microsoft Identity Security Specialist to strengthen our identity security posture in a hybrid London-based role. You will design, implement and optimise Microsoft Entra ID across enterprise environments, focusing on Conditional Access, Identity Protection, PIM and passwordless authentication.

The role blends hands-on engineering with design, automation and AI-assisted analysis to improve identity operations and security monitoring.

Qualifications

• Hands-on experience in IAM, including Microsoft Entra ID administration and security in complex enterprises.
• Experience implementing Conditional Access, Identity Protection, PIM and Identity Governance.
• Experience deploying passwordless and phishing-resistant authentication.
• Strong grasp of OAuth 2.0, OpenID Connect and SAML modern auth protocols.
• Proficiency in scripting and automation; familiarity with CI/CD pipelines such as Azure DevOps or GitHub.

Responsibilities

• Design, implement and optimise Microsoft Entra ID as the strategic identity platform.
• Configure and enhance Conditional Access, Identity Protection, PIM, and Just‑in‑Time access controls.
• Support identity governance including access reviews and role-based access models.
• Implement phishing-resistant authentication and Zero Trust controls across SaaS, cloud and on‑prem apps.
• Develop reusable pipelines and automation for identity operations; enable self‑service patterns.

Skills

Identity & Access Management

Microsoft Entra ID administration

Conditional Access

Identity Governance

Phishing-resistant authentication

Zero Trust

Scripting & automation

Azure DevOps or GitHub

Tools

Azure DevOps

GitHub

PowerShell

Microsoft Defender

Microsoft Sentinel

Log Analytics

Job description

Willis Towers Watson is seeking a Senior Microsoft Identity Security Specialist to strengthen our identity security posture in a hybrid London-based role. You will design, implement and optimise Microsoft Entra ID across enterprise environments, focusing on Conditional Access, Identity Protection, PIM and passwordless authentication.

The role blends hands-on engineering with design, automation and AI-assisted analysis to improve identity operations and security monitoring.