Senior Exchange & Microsoft 365 Cloud Engineer

A23 Pty Ltd; Sydney; Hybrid; AUD 120,000 - 180,000; Full time

Benefits offered by this job

Annual wellbeing allowance

Job summary

a23 seeks a Senior Microsoft 365 Exchange Engineer to support and secure Exchange environments across on-premises, hybrid and Microsoft 365 cloud platforms. The role is full-time, with a hybrid arrangement including customer sites and the a23 office, and reports to the Practice Lead – Modern Workplace.

You will design, migrate, administer and support enterprise messaging, leading complex migrations and collaborating with identity, security and cloud teams to ensure reliable service delivery.

Qualifications

• Australian Citizenship required and ability to obtain Australian Government Security Clearance.
• Extensive practical experience with Microsoft Exchange Server and Exchange Online.
• Strong knowledge of hybrid Exchange deployments and Microsoft 365 Platform (Teams, SharePoint).
• Demonstrated experience in secure Government or enterprise environments.
• Proficient with Entra ID, Azure AD and Active Directory; PowerShell; email security controls (SPF/DKIM).

Responsibilities

• Design, implement, maintain and support Exchange Server and Exchange Online environments.
• Administer on-premises, hybrid and Microsoft 365 cloud messaging platforms.
• Configure and manage mail flow, retention, and compliance controls.
• Troubleshoot complex email, identity, messaging, performance and availability issues.
• Monitor messaging service health and address security and operational risks.
• Lead Exchange migrations, including hybrid and cloud transformations.
• Support integrations with Entra ID, AD and related identity services.
• Ensure security, compliance and operational requirements are met.
• Develop solution designs, architecture docs and operating procedures.
• Provide technical leadership and mentoring to other engineers.

Skills

Microsoft Exchange

Exchange Online

Entra ID

Azure Active Directory

Active Directory

PowerShell

Email security

SPF

DKIM

Hybrid deployments

Microsoft 365

Teams

SharePoint

Security clearance

Job description

a23 seeks a Senior Microsoft 365 Exchange Engineer to support and secure Exchange environments across on-premises, hybrid and Microsoft 365 cloud platforms. The role is full-time, with a hybrid arrangement including customer sites and the a23 office, and reports to the Practice Lead – Modern Workplace.

You will design, migrate, administer and support enterprise messaging, leading complex migrations and collaborating with identity, security and cloud teams to ensure reliable service delivery.