Our client, a leading federal organization, is seeking an exceptional Senior Microsoft Exchange Administrator to join their team on a contract running until March 31, 2026, with strong potential for extension. This primarily remote role requires residence within proximity to Ottawa (e.g., Montreal, Toronto) and eligibility for Government of Canada Reliability Clearance. You’ll bring deep expertise in the Microsoft 365 ecosystem and advanced Exchange administration skills, ideally extending beyond standard configurations to complex hybrid environments. In this role, you’ll design, implement, maintain, and optimize a mission-critical Exchange infrastructure, ensuring security, availability, and performance for thousands of users. Experience with Windows, Mac, and Linux environments is a plus, as are bilingual communication skills. If you’re a seasoned professional with a track record of managing large-scale Exchange environments, driving migration projects, and solving complex messaging challenges, this is your opportunity to make an impact in a high-profile federal setting.

QUALIFICATIONS

• Minimum 5 years of hands-on experience administering Microsoft Exchange Server environments.
• Experience managing hybrid Exchange environments integrating on-premises Exchange and Exchange Online (Office 365).
• Proven expertise in Exchange migration projects, upgrades, and performance tuning.
• Solid understanding of Microsoft Active Directory, DNS, SMTP, and networking concepts related to Exchange.
• Experience with PowerShell scripting for automation and administration.
• Familiarity with email security protocols and technologies (SPF, DKIM, DMARC, TLS).
• Knowledge of backup and disaster recovery solutions for Exchange.
• Experience with Mac and Linux systems is considered an asset.

Certifications (preferred but not mandatory):

• Microsoft Certified: Messaging Administrator Associate
• Microsoft Certified: Azure Administrator Associate

Key Competencies:

• Strong analytical and problem-solving skills.
• Excellent communication skills, with the ability to explain technical concepts to non-technical stakeholders.
• Ability to work both independently and collaboratively in a team-oriented environment.
• Detail-oriented with strong organizational and documentation skills.
• Ability to manage multiple priorities and work under pressure.
• Commitment to continuous learning and staying updated on emerging technologies.

Security Requirements:

• Must be eligible to obtain and maintain a Government of Canada security clearance.

SUMMARY

If you’re interested in learning more please submit your résumé and one of our senior Recruiters would be happy to give you a call to discuss further.
Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada’s workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.
Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to accessibility@randstad.ca to ensure their ability to fully participate in the interview process

• Administer, configure, and maintain the Microsoft Exchange Server environment (on-premises, Exchange Online, or hybrid deployments).
• Manage mailbox provisioning, permissions, and distribution groups for all NRC users.
• Monitor system performance and troubleshoot issues related to Exchange services, mail flow, and connectivity.
• Plan, design, and implement Exchange upgrades, patches, and migrations, ensuring minimal disruption to users.
• Ensure compliance with organizational policies, security standards, and regulatory requirements for email and messaging systems.
• Manage and maintain Exchange databases, backups, and disaster recovery plans.
• Collaborate with security teams to implement anti-spam, anti-malware, and email encryption solutions.
• Provide tier 2/3 support and resolve complex email-related issues escalated from the IT Service Desk.
• Develop and maintain comprehensive documentation of Exchange infrastructure, configurations, and procedures.
• Work closely with network, infrastructure, and application teams to integrate Exchange with other systems and services (e.g., Active Directory, SharePoint, Teams).
• Participate in capacity planning and forecasting for Exchange resources based on usage trends and growth projections.
• Stay current with Microsoft Exchange product updates, industry trends, and best practices to recommend improvements.
• Provide technical guidance and mentoring to junior team members and other IT staff.