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Aliant Resources

Exchange IT Specialist

Mississauga, ON, Canada

Pay: Salary: $50.39 per hour (contractors must be incorporated)
Job type: Contract
Apply by: Oct 29, 2026
Working hours: 35 hours per week
Posting language: English
Posted: Sep 29, 2026

Apply About employer

Applications open in a new tab.

Original job description

Job ID: AR984

Job Title: Exchange IT Specialist

Closing Date: October 2, 2026, 2:00 p.m. (Eastern Standard Time)

Location: Mississauga, Ontario (On-site/Hybrid)

Employment Type: Contract (3 months)

Start Date: Immediate

End Date: 3 months from start date

Work Schedule: 35 hours per week

Salary: $50.39 per hour (contractors must be incorporated)

Consider your new role with Aliant Resources and our municipal government client The City of Mississauga.

About Us:

Aliant Resources is a dedicated provider of IT staffing services, committed to promoting diversity, equity, inclusion, belonging, anti-racism, and accessibility in all facets of our operations.

Job Summary:

Under the direction of the Supervisor, Platform Applications & Identity Services, the successful candidate will provide expert administration, technical leadership, and functional guidance in the areas of technology, processes, and operational procedures, with a focus on Exchange Server Subscription Edition (SE), Exchange Online (EXO), and Cisco Cloud Email Security Appliance (CES). The role includes day-to-day operational support, management of assigned work requests, and the delivery of third-level technical support. The successful candidate will also collaborate with cybersecurity, infrastructure, identity, and application teams to ensure the security, reliability, and availability of the City's messaging environment.

Duties and Responsibilities

Exchange Administration & Hybrid Operations

Administer and manage Exchange Hybrid architecture which includes OAuth authentication, federation services, organization relationships, certificate management, hybrid mail flow, free/busy integration, mailbox migrations, and coexistence between EXO and SE.
Manage mailboxes, distribution groups, shared mailboxes, Database Availability Groups (DAG), mail flow, connectors, and hybrid configuration.
Monitor system health, performance, capacity, and service availability.
Plan and implement Exchange upgrades, patches, migrations, and maintenance activities.
Troubleshoot complex messaging, mail routing, and calendar-related issues.

Email Security & Cybersecurity Collaboration

Administer and maintain the Cisco Cloud Email Security Appliance (CES) environment.
Collaborate with the Cyber Security team to identify and remediate vulnerabilities impacting messaging systems.
Develop, implement, maintain, and optimize email security policies, content filtering rules, anti-spam, anti-malware, threat protection controls, sender reputation controls, HAT policies, encryption policies, message filters, and allow/block lists.
Support incident investigations involving phishing, malware, FOI requests, and other email-based threats.
Participate in security audits, compliance reviews, and remediation initiatives.

Email Delivery & Application Integration

Work with application and infrastructure teams to configure and troubleshoot:
SMTP relay services
Email delivery issues
SPF, DKIM, and DMARC configurations
Mail routing and transport rules
Third-party application integrations
Assist in onboarding new applications and services requiring email functionality.
Ensure reliable and secure email delivery across cloud and on-premises systems.

Operational Support

Manage and resolve incidents, service requests, and change requests through ServiceNow.
Develop and maintain technical documentation, standard operating procedures, and knowledge base articles.
Provide technical guidance to cross-functional teams to support and troubleshoot messaging services hosted across Microsoft 365, Microsoft Entra ID, Exchange Online Protection (EOP), Microsoft Azure, and AWS-integrated workloads.
Participate in incident response activities as required, including troubleshooting and remediation of critical messaging and security issues.
Provide occasional after-hours support for planned maintenance, system upgrades, and emergency incidents.

Skills and Qualifications

Post-secondary degree or diploma in Computer Science or a related discipline, combined with a minimum of five (5) years of experience.
Microsoft certifications related to Microsoft 365, Exchange, Azure, and/or Security are considered an asset.
Experience working in a municipal government or public-sector environment.
Knowledge of compliance, records retention, email governance, and regulatory requirements.
Experience administering and supporting Microsoft Exchange Server Subscription Edition (SE) and Exchange Online (EXO), including migrations, mail flow, routing, retention policies, transport rules, filters, eDiscovery, and industry best practices.
Experience with PowerShell automation and scripting for Exchange administration and operational tasks.
Excellent analytical, problem-solving, and troubleshooting skills.
Excellent communication, interpersonal, and customer service skills.
Demonstrated ability to work independently with minimal supervision, as well as collaboratively within project teams to meet established timelines.
Ability to provide expert technical advice, guidance, and recommendations on IT-related issues to clients, colleagues, management, committees, and cross-functional teams.

Security Credentials:

Successful candidates will be required to successfully complete:

Three (3) professional reference checks
Criminal Background Check
Education Verification

Additional client security screening may be required before onboarding.

At Aliant Resources, we value diversity and inclusion and we encourage candidates of all backgrounds to apply. We are an equal opportunity employer and we look forward to welcoming you to our team.

Diversity Statement:

At Aliant Resources, we are committed to building a workforce that reflects the communities we serve and to promoting a diverse, anti-racist, inclusive, accessible, merit-based, respectful, and equitable workplace.

Accessibility Statement:

Aliant Resources is dedicated to making our recruitment process accessible to everyone with or without a disability. We adhere to workplace accessibility standards to ensure that individuals with disabilities can fully participate in employment opportunities. We understand the importance of identifying and removing barriers, and we strive to provide an inclusive experience for all candidates.

Workplace Accommodations:

We offer workplace accommodations throughout the recruitment process and all aspects of employment consistent with the requirements of the AODA and OHRC.

If you require workplace accommodations due to a disability, injury, illness, or any other condition that may affect your ability to apply online or perform essential job functions, please reach out to us at accommodations@aliantresources.com. Your request will be answered, and we will collaborate with you to provide appropriate workplace accommodations as required.

How to Apply:

You must apply online here on LinkedIn.

Your resume should not exceed three (3) pages.

Note for all Applicants:

We thank all applicants for their interest but advise that only those selected for further consideration will be contacted.

Qualified applicants may be considered for other comparable positions.

Please prepare your application in accordance with the qualifications posted in this job advertisement.

Apply About employer

More about this job

Responsibilities

Administer and support the City’s Exchange hybrid environment, Exchange Online, and Cisco email security, including mail flow, migrations, system health, upgrades, and complex troubleshooting. Coordinate with cybersecurity and other technical teams to protect and maintain messaging services, support application email integrations, resolve service requests, and document operational procedures.

Requirements

Requires a post-secondary degree or diploma in Computer Science or a related discipline and at least five years of experience, including administration of Exchange Server Subscription Edition and Exchange Online. Candidates should have PowerShell scripting, strong troubleshooting and communication skills, and knowledge of email security and governance; Microsoft certifications and public-sector experience are assets.

Skills

Exchange Server Administration
Exchange Online
Exchange Hybrid Operations
Cisco Cloud Email Security
PowerShell Scripting
Email Security
Mail Flow and Routing
Mailbox Migrations
Microsoft 365
Microsoft Entra ID
Incident Response
Troubleshooting
ServiceNow
Email Governance and Compliance
Technical Documentation
Cross-Functional Collaboration

Visa sponsorship

Not detected in the job text

Keywords

Exchange Server Subscription Edition
Exchange Online
Exchange Hybrid
Cisco Cloud Email Security Appliance
PowerShell
Microsoft 365
Microsoft Entra ID
Exchange Online Protection
Microsoft Azure
Amazon Web Services
ServiceNow
OAuth
Federation Services
Database Availability Groups
SMTP Relay
SPF
DKIM
DMARC
Transport Rules
Email Security Policies
Anti-Spam
Anti-Malware
Mailbox Migrations
Email Governance
Records Retention
eDiscovery
Incident Response
Cybersecurity
Municipal Government
Microsoft Certifications

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