Security Engineer in City of Westminster

We’re expanding our security engineering team and looking for someone who enjoys solving practical security problems, learning new tools, and working across a modern Microsoft environment. You’ll help strengthen our detection and response processes, improve cloud security in Azure, and support engineering teams in building safely and responsibly. This is a hands‑on role that covers a mix of operational work and engineering improvements. You don’t need to know everything already — you’ll have opportunities to learn, try new approaches, and pick up experience across different areas of security.

What you’ll work on:

• Help to improve and maintain our Azure‑based security tooling, including Microsoft Sentinel, Defender XDR, and Defender for Cloud
• Contribute to the optimisation, tuning, and maintenance of SOC tools
• Investigate suspicious activity and support incident response when needed
• Contribute to cloud security hardening in areas such as identity, access, networking, storage, WAF, and logging
• Participate in security risk assessments, threat modelling and vulnerability management
• Support penetration testing by organising test execution, reviewing results, and helping teams prioritise fixes

What we’re looking for:

• Around 3‑5 years in a security engineering or internal security team role
• Practical understanding of cybersecurity fundamentals and common risks
• Experience with infrastructure‑as‑code (Bicep, Terraform, or similar)
• Familiarity with PowerShell for automation or general scripting tasks
• Good problem‑solving skills and attention to detail
• Able to work in a fast‑moving environment with competing priorities
• Some knowledge of frameworks like SOC 2, ISO 27001, GDPR, or NIST CSF
• A growth mindset and curiosity to keep learning

How we reward you:

• Competitive bonus scheme – designed to reward and recognise high performance
• Flexible benefits budget – a pot to fund meaningful benefits for you, whether it’s hormone or fertility testing, cancer screening, neuro‑diversity coaching or something that matters for you.
• A range of salary sacrifice options to help you make tax‑efficient savings on electric cars, nursery schemes, home and tech goods.
• Around the World scheme – 3 months work from anywhere scheme
• Mental wellbeing support – Access therapy and mental health sessions through Spill
• Learning and development – £1,000 personal development budget to help you grow in your role.
• Private health care – Enjoy all the benefits AXA has to offer, including reduced gym memberships and medical history disregarded.
• Medical cash plan – To help you with the costs of dental and optical expenses.
• Life insurance and income protection – four times your annual salary for peace of mind.
• Matched pension contributions up to 5%
• 25 days holiday – plus bank holidays, well‑being days and volunteering days.
• Enhanced parental leave – enhanced maternity, paternity and adoption pay.

All are welcome. At Flagstone, we’re assembling a diverse team that defies our industry’s norms. Think this role could suit you? We encourage you to apply, no matter your background.