Principal Microsoft 365 Consultant

Role Introduction

We're seeking an exceptional Principal Consultant to act as a senior technical authority. This role is ideal for an experienced engineer who thrives in 4th line support, complex project delivery, and cross-platform problem solving in multi-tenant environments typical of a Microsoft-focused MSP.

You'll operate at the forefront of service excellence-architecting high-impact solutions, resolving deeply technical issues, and contributing to client-facing delivery across strategic and enterprise-level projects.

This is not a line management role but one where leadership is demonstrated through technical depth, collaboration, and influence.

What You Will Do

As a Principal M365 Consultant, you will:

• Provide 4th line escalation and root cause analysis for complex issues across Microsoft 365 and Power Platform
• Design and deliver robust multi-tenant solutions including migrations, integrations, advanced configurations, and governance frameworks
• Own and maintain solution templates, automation scripts, and reusable assets to uplift technical maturity across the business
• Collaborate with Service Transition teams to validate new customer environments, ensuring platform integrity and best-practice readiness
• Lead technical aspects of M365 and Power Platform projects across diverse customer estates, supporting project managers and delivery leads
• Advise customers on security posture enhancements, including Secure Score, audit log management, SIEM integration, and regulatory alignment
• Ensure Power Platform governance policies, lifecycle models, and technical controls are applied consistently across customer environments
• Support subscription and licensing management in collaboration with Asset Management and CSP services
• Apply LLM prompt engineering and AI tooling to improve resolution workflows, automate documentation, and enhance knowledge reuse across support functions
• Participate in technical workshops, discovery sessions, and client consultations as a senior subject matter expert
• Track Microsoft roadmap developments and contribute to readiness planning and service evolution strategies

What You Will Have

As a Principal M365 Consultant, you will have:

• Proven experience designing, supporting, and delivering Microsoft 365 solutions in MSP/multi-customer environments
• Deep technical expertise across Microsoft 365 services: Exchange Online, SharePoint Online, Teams, OneDrive, and Entra ID
• Strong working knowledge of the Power Platform ecosystem-including Power Apps, Power Automate, and Copilot Studio-with the ability to ensure governance, lifecycle controls, and tenant-level compliance
• Proficiency with scripting, automation, and prompt engineering techniques using tools like PowerShell, Graph API, and LLM-integrated assistants to drive resolution and enhance productivity
• Familiarity with management frameworks like Microsoft 365 Lighthouse and Intune in a delegated admin context
• Capable of leading complex investigations and providing 4th line engineering support for deeply technical issues across customer estates
• A strong communicator-able to present issues and solutions clearly to technical and non-technical stakeholders
• Proactive in staying current with Microsoft's evolving roadmap and able to advise on its operational and security impact
• Passionate about delivering secure, scalable, and well-governed cloud environments without stepping into solution design or app development

Preferred Certifications

• Microsoft 365 Administrator Expert
• Microsoft Power Platform Fundamentals or Functional Consultant Associate
• Azure Administrator Associate or Architect Associate
• Microsoft Security certifications (MS-500, SC-200, SC-300)

What We Do For You

Wellbeing focused - Our people are our greatest assets, and ensuring everyone feels their best self to come to work is integral

• Annual Leave - 26 days of annual leave, plus public holidays and the ability to buy additional days
• Employee Assistance Programme- Free advice, support, and confidential counselling available 24/7 through Care First
• Endometriosis Friendly Employer - We are proud to confirm our commitment to developing an environment and culture that allows those with endometriosis to thrive in the workplace

Personal Growth - Regardless of where you are at in your career, we're committed to enabling your growth personally and professionally

• Development Programmes - From Future Managers to Leadership Training, our development programmes help you get where you need to go
• Performance Bonus - Our Group-wide bonus scheme enables you to reap the rewards of your success

Financial wellbeing - We understand as well as your mental wellbeing, your financial wellbeing is really important

• Pension Scheme- Our plan with Scottish Widows offers 5% matched contribution by the company
• Income protection insurance - Providing you with support and assistance when you need it most

Recognition - Highlighting and rewarding the great work our people do

• Performance & Talent- Our own technology platform that allows you to get real-time feedback, conversations and goals to help you become your best self

Making a Difference - we provide opportunities to help our people make a difference to the causes they care about

• MatchIt! - Fundraise for a cause close to your heart and OneAdvanced will match part of the funding
• Volunteering Time - Our volunteering leave scheme allows you to use your time to help those who need it
• Pennies from Heaven - donate the pennies from your pay check to help make a difference without lifting a finger

Who We Are

OneAdvanced is one UK's largest providers of business software and services serving 20,000+ global customers with an annual turnover of £330M+. We manage 1.5 million 111 calls per month, support over 2 million Further Education learners across the UK, handle over 10 million wills, and so much more. Our mission is to power the world of workand, as you can see, our software underpins some of the UK's most critical sectors.

We invest in our brilliant people. They are at the heart of our success as we strive to be a diverse, inclusive and engaging place to work that not only powers the world of work, but empowers the growth, ambitions and talent of our people.

To learn more about working at OneAdvanced please click here