M365 Cloud Engineer (Fixed Term)

About Harris

Harris is a leading provider of financial management and Customer Information Systems (CIS) software solutions serving Public Sector, Schools, Utilities, and Healthcare organizations across North America. Since 1976, Harris has built a reputation for delivering robust, feature-rich solutions and long-term customer partnerships.

About the Role

Our Corporate IT team seeking an experienced Office 365 Engineer, with a strong emphasis on Exchange, Teams and, Active Directory (AD)/identity management. This role is responsible for designing, implementing, and maintaining Exchange (on-premises and hybrid), Teams and, Azure AD (Microsoft Entra ID).

Key Responsibilities

• Lead the design, configuration, and ongoing administration of Exchange Online within the Microsoft 365 tenant, including mailbox provisioning, shared/resource mailboxes, distribution groups, Tenant to Tenant migration projects.

• Architect and manage end-to-end mail flow including send/receive connectors, transport rules, smart host relay, third-party gateway integrations (e.g., Mimecast, Proofpoint), and DNS records (MX, SPF, DKIM, DMARC)

• Serve as the primary owner of Exchange Online Protection (EOP) and Microsoft Defender for Office 365, configuring and tuning anti-phishing, anti-spam, safe links, safe attachments, and protection policies

• Act as the Tier 3/4 escalation point for all email-related incidents including NDRs, mail flow failures, spoofing, BEC attacks, and malware delivery events, with full Root Cause Analysis (RCA) documentation

• Design, deploy, and maintain Microsoft 365 DLP policies across Exchange Online, Teams, SharePoint, and OneDrive in alignment with GDPR, and HIPAA requirements, tuning conditions and exceptions to minimize false positives

• Administer Microsoft Purview compliance solutions including retention policies, sensitivity labels, MRM, litigation holds, eDiscovery (Content Search and Premium), communication compliance, and insider risk management policies

• Manage email authentication posture by continuously validating and enforcing SPF, DKIM, and DMARC configurations, reviewing Microsoft Secure Score recommendations

• Develop and maintain PowerShell automation scripts for Exchange Online bulk operations, user lifecycle workflows (onboarding/offboarding), compliance reporting, and Microsoft Graph API integrations with ITSM or HRIS platforms

• Follow ITIL and change management best practices for all platform changes — including raising RFCs, participating in Change Advisory Board (CAB) reviews, maintaining incident/problem records, and producing post-implementation reviews (PIR) for major changes impacting Exchange, Teams, or voice environments

• Administer the Microsoft Teams — managing messaging, meeting, and app permission policies, Teams Rooms (MTR) devices, and providing Tier 2/3 escalation support for Teams incidents

• Administer the Entra ID - identity management using Azure AD connect, SSO technologies like SAML.

• Knowledge of Windows and Active Directory, TCP/IP, DHCP, DNS, etc.

• (Nice to Have) Administer RingCentral user provisioning and IVR..

Preferred Qualifications

• Experience with large-scale Exchange migrations and tenant consolidations

• Microsoft certifications (Exchange, Teams, Microsoft 365, or Azure)

Benefits

Harris offer an extremely competitive UK employee benefits programme. 5 Personal Days leave entitlement are granted over and above the standard 25 days holiday and bank holidays. Harris also offers all UK employees an annual Lifestyle Reward amounting £325 per annum/pro rata.

Supporting your application

Our recruitment process will comprise of interviews and, at times, a written exercise, an assessment day and/or a presentation. As an equal opportunities’ employer, we want to make sure we do all we can to make this a positive experience for you. If your application is progressed, please make us aware of any adjustments or additional support we can provide you with.