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

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.

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
- 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:

- Three (3) skilled reference checks
- Criminal Background Check

Additional client security screening may be req

📌 Exchange IT Specialist (Mississauga)
🏢 Aliant Resources
📍 Mississauga