Senior M365 Security Consultant in Westminster

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.

We are looking for an experienced Senior M365 Security Consultant to join our leading Microsoft Security Practice. In this role, you will help organisations design, improve, and mature their Cyber Security posture through the use of M365 Security and Compliance technologies. This is a client-facing, senior-level role where you will combine deep hands-on technical expertise with strong consulting skills. You will own engagements end-to-end: from discovery and strategy through to design and implementation.

If you enjoy solving complex security challenges, influencing stakeholders, and seeing the tangible impact of your work, this role gives you the space and trust to do exactly that.

What You’ll Be Doing

• Advise & Assess: Partner with clients to understand their business and security challenges, assess their Microsoft 365 environments, and identify meaningful improvement opportunities.
• Design & Deliver: Architect and implement security and compliance solutions across Microsoft 365, aligned to Microsoft best practices, Zero Trust, and regulatory requirements.
• Shape Strategy: Help clients define security strategies, roadmaps, and policies across organisations of varying sizes and maturity.
• Hands-On: Lead implementations, tenant migrations, and greenfield deployments translating designs into secure, usable solutions.
• Support Pre-Sales: Collaborate with sales teams on solution design, provide technical input, and contribute to Statements of Work and proposals.

What You’ll Bring

• You’re an experienced M365 security professional who is comfortable working independently, engaging directly with customers, and making informed technical decisions.
• Strong experience with Microsoft 365 security and compliance technologies, including:

• 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

Preferred Certifications

• 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

What Sets You Apart

• You’re comfortable operating as a trusted advisor, not just a technical implementer.
• You can influence stakeholders from engineers through to senior leadership.
• You take a pragmatic, outcome-focused approach to security.
• You enjoy variety and can manage multiple client engagements without losing quality.
• You’re curious, motivated, and keep up with evolving threats and Microsoft capabilities.

Why Join Us?

• CyberOne Ranked #79 Globally in MSSP Alert's 2025 Top 250 MSSPs.
• Work with experienced cybersecurity professionals on meaningful, high-impact engagements.
• Exposure to a wide range of industries, challenges, and modern Microsoft security solutions.
• A collaborative environment that values expertise, autonomy, and continuous learning.
• Competitive compensation, strong benefits, and a clear path for career progression.

If you’re passionate about Microsoft 365 security and want a role where your expertise genuinely makes a difference, we’d love to talk. Let’s redefine what it means to be secure. Together.