Senior M365 Security Consultant

CyberOne
London

“I am hugely excited about my future and the future of CyberOne. I have enjoyed my time here immensely and have learnt a huge amount in a short space of time, year-for-year I've learnt more here than I have at Microsoft and PwC.” - CyberOne Consultant

About CyberOne

CyberOne is a pure-play Microsoft security partner dedicated to helping enterprises realise the full value of the Microsoft Security portfolio—across Defender XDR, Sentinel, Entra, Purview, Intune, Copilot for Security and more. We combine deep technical expertise with outcome-driven services that accelerate secure cloud adoption, modernise threat protection and simplify compliance.

Job Title: Senior M365 Security Consultant

Location: Remote ; Occasional travel

Employment Type: Full-time

The Role:

As a Senior M365 Security Consultant, you’ll work across a wide variety of customer environments helping organisations improve their security posture through Microsoft 365 security and compliance technologies.

One week you might be designing a Zero Trust roadmap for a large enterprise. The next, leading a Purview deployment, delivering a Defender implementation, or helping a customer untangle years of technical debt across identity and endpoint management.

You’ll own engagements end-to-end from technical pre-sales through to delivery.

You’ll also play a key role internally: supporting sales conversations, shaping our services, and acting as a trusted Microsoft security specialist both for customers and within CyberOne itself.

You’ll also directly engage with Microsoft’s product group and gain earlier insights to their ever-changing technology through in-person workshops and NDA access to new features and tools.

What You’ll Be Doing :

  • Partner with customers to understand their security challenges, risks, and business priorities

  • Assess Microsoft 365 environments and identify opportunities to improve security maturity

  • Design and implement Microsoft security and compliance solutions aligned to Zero Trust principles and Microsoft best practices

  • Lead hands-on deployments across Microsoft Defender, Purview, Entra ID, Intune, and the wider M365 security stack

  • Deliver tenant migrations and greenfield Microsoft security implementations

  • Help customers define security strategies, roadmaps, and governance approaches

  • Work closely with stakeholders ranging from technical teams through to senior leadership

  • Support pre-sales engagements, technical workshops, and Statements of Work

  • Collaborate directly with Microsoft product and engineering teams as a technical representative for CyberOne

You’ll be a great fit if you bring experience with:

  • Microsoft Purview

  • Microsoft Defender for Endpoint

  • Microsoft Defender for Office 365

  • Microsoft Defender for Identity

  • Microsoft Defender for Cloud Apps

  • Microsoft Entra ID

  • Microsoft Intune

Plus experience in:

  • M365 tenant migrations and greenfield deployments

  • Security assessments and hands-on remediation

  • Consulting directly with customers in both technical and strategic engagements

  • Explaining complex security concepts clearly to both technical and non-technical audiences

What sets you apart:

You’re not just a technical implementer you’re someone customers trust. Someone with credibility.

You know how to balance security best practice with real-world business needs. You’re comfortable leading conversations, making decisions, and guiding organisations through change.

You probably enjoy:

  • Solving messy, complex security problems

  • Working across different customers and industries

  • Having total autonomy and ownership over your work

  • Staying close to emerging Microsoft security capabilities and evolving threats

  • Building relationships as much as building solutions

Certifications we’d love to see:

  • SC-100 – Microsoft Cybersecurity Architect

  • SC-200 – Microsoft Security Operations Analyst

  • SC-300 – Microsoft Identity and Access Administrator

  • SC-400 – Microsoft Information Protection and Compliance Administrator

  • MS-500 – Microsoft 365 Security Administrator Associate

  • MS-102 – Microsoft 365 Administrator

Why CyberOne?

CyberOne is recognised globally as one of the world’s leading Managed Security Service Providers ranked #79 in MSSP Alert’s 2025 Top 250 MSSPs.

We are a top Microsoft partner with access to the Microsoft Intelligent Security Association (MISA), and the Security Elite programmes giving us unfiltered access into the heart of Microsoft. We are also Microsoft MXDR Verified and provide one of the most comprehensive Microsoft-based managed SOC offerings globally.

But more importantly, we’re building a team of people who genuinely care about security, technology, and doing meaningful work for customers.

Here, you’ll get:

  • Exposure to complex, high-impact security projects

  • The opportunity to work with experienced Microsoft security specialists

  • A collaborative environment with real autonomy and trust

  • Continuous learning and development opportunities

  • Competitive compensation and benefits

  • A clear path for progression as our Microsoft Security Practice continues to grow

Interested?

If you’re passionate about Microsoft security, value working in a business were culture is first and foremost, and want a role where you can combine pre-sales, consulting, and hands-on delivery we’d love to hear from you.

Posted 2026-02-06

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