Systems Engineer (Exchange)

Locations: UK - London (St Botolph)

Time Type: Full time

Posted on: Posted Today

Job Requisition ID: 2026-395

Position Type: Permanent, 35 hours per week

Overview:

Standing still is not an option in the current world of Insurance. TMHCC are one of the world’s leading Specialty Insurers. With deep expertise in our chosen lines of business, our unparalleled track record and a solid balance sheet, TMHCC evaluates and manages risk like no one else in the industry. Looking beyond profit, empowering our people and delivering on our commitments are at the core of our customer values, and so is a desire to grow and provide creative and innovative solutions to our clients.

Job Purpose:

The Infrastructure Collaboration Engineering team is looking to hire a technical person with expertise in M365, with a focus on Exchange, OneDrive, Teams and Entra ID. In this role, you will work as a technical lead and subject matter expert in designing, architecting, implementing, operating, and maintaining access management solutions using M365 and Entra ID.

Key Responsibilities:

• Exchange: Design, implement, and configure Exchange Online environments, including mailbox setup, migration from on-premises Exchange, and hybrid configurations. Manage user mailboxes, distribution groups, shared mailboxes, and resource mailboxes. Perform day-to-day administration using the Microsoft 365 admin center and PowerShell. Implement and manage security features such as anti-phishing, anti-spam, and malware protection. Ensure compliance with organizational policies and regulatory requirements using features like retention policies, eDiscovery, and data loss prevention (DLP). Monitor Exchange Online health and performance using tools like Microsoft 365 Service Health and Message Trace. Troubleshoot mail flow issues, connectivity problems, and resolve service incidents. Provide technical support to end-users for Exchange Online-related issues, including mailbox access, email delivery, and calendar synchronization. Educate users on best practices and new features. Plan and execute mailbox migrations from legacy systems to Exchange Online, ensuring minimal disruption and data integrity. Integrate Exchange Online with other Microsoft 365 services and third-party applications as required. Utilize PowerShell and other automation tools to streamline administrative tasks, generate reports, and enforce organizational policies. Stay updated with the latest Exchange Online features, best practices, and Microsoft roadmap changes. Proactively recommend and implement improvements to enhance service reliability and user experience.
• OneDrive: Migrate legacy file storage systems to OneDrive for Business, ensuring data integrity and minimal downtime. Oversee storage quotas, user access, and sharing settings to maintain organizational standards. Implement and enforce security policies, including Data Loss Prevention (DLP), encryption, and access controls. Ensure compliance with industry regulations and internal governance standards for data storage and sharing. Monitor for and respond to security incidents related to OneDrive usage. Provide tier 2/3 support for OneDrive-related issues, coordinating with Microsoft support as necessary. Develop and deliver training materials, workshops, or webinars to promote OneDrive adoption. Integrate OneDrive with other M365 services to streamline workflows. Leverage Power Automate or similar tools to automate routine tasks and processes related to file management. Collaborate with developers and IT teams to enable custom integrations as needed.
• MS Teams: Plan, deploy, and configure Microsoft Teams environments according to business requirements, including tenant setup, policies, and integrations. Oversee day-to-day administration of Teams, managing users, groups, channels, and permissions. Monitor usage and maintain system health. Implement and manage security protocols, data governance, and compliance policies to protect organizational data and ensure regulatory adherence. Integrate Teams with other Microsoft 365 services and third-party applications to enhance collaboration and workflow automation. Provide technical support to end-users, resolve issues, and handle escalations related to Teams functionality, connectivity, and performance. Utilize reporting tools to monitor usage, analyze trends, and provide actionable insights for continuous improvement. Stay current with Microsoft Teams updates, new features, and best practices; implement changes and communicate impacts to stakeholders. Work closely with IT teams, business units, and external partners to align Teams capabilities with organizational goals and strategies. Maintain thorough documentation of configurations, procedures, troubleshooting steps, and change management activities.
• Entra ID: Proven expert knowledge of Azure Entra ID capabilities such as Conditional Access Policies, Privileged Identity Manager and Application Registrations. Strong understanding of PIM and the assignment of roles/IAM permissions on Management Groups, Subscriptions and Resources, aligned with Just-in-Time access principles. Azure Infrastructure Management to include user accounts, groups, conditional policies, Intune management, mobile device management, and endpoint security. Strong understanding of App registration, Enterprise Apps, SPNs and managed identities with the understanding of least privileged administration when it comes to MS Graph API allocation of permissions. Strong understanding of multifactor authentication, SSPR and WHfB, ensuring secure privileged authentication workflows. Strong PowerShell scripting skills, automation, and scheduling skills when working with data in Azure. Good understanding of Intune policies management and autopilot. An individual that stays abreast of the latest Entra ID features, best practices, and security trends, and makes recommendations for continuous improvement.

Competencies:

• Planning: Follow work plans, established timelines, and predefined goals for assigned work. Meet commitments on deadlines.
• Communication: Communicate activities, results, and observations with employees and management as appropriate.
• Cost Management: Identify areas for improvement in existing business practices. Perform work thoroughly in a cost-efficient manner and at a high productivity level.
• Business Controls and Policies: Comply with all corporate policies and procedures. Report any breakdowns in controls to management. Conduct all activities in a safe manner.
• People Management: No people management responsibility.
• Other: Having knowledge and experience with SharePoint is beneficial. Demonstrating expertise and familiarity with Rubrik is an asset. Microsoft and Azure certification are highly beneficial.

Tokio Marine HCC is a leading specialty insurance group with offices in the United States, the United Kingdom, Europe, and other locations. With the strength and stability that comes from being a member of the Tokio Marine group, and more than forty years of growth, profitability, and stability, we offer important insurance products that most people do not even know exist. The Tokio Marine HCC Group of companies is an equal opportunity employer.