Senior Windows System Administrator – Email & Exchange

OpenText; Mississauga; On-site; CAD 82,000 - 122,000; Full time

Job summary

OpenText, a global leader in information management, is seeking a Sr. Windows System Administrator (Email Server) in Mississauga, ON.

This full-time, on-site position supports Windows Server environments, Exchange mail flow, and virtualization technologies to drive secure, reliable messaging infrastructure. You will manage Hyper‑V/VM Manager, Azure, DNS, AD, and SQL, perform server upgrades, migrations, and patching, and partner with development teams to deploy new services.

Qualifications

• 10+ years of Windows server management experience.
• Bachelor’s degree in Information Systems or equivalent.
• Strong knowledge of DNS, Active Directory, SMTP, TLS, and load balancing.
• Experience with virtualization, Azure, and Microsoft SQL.
• Familiarity with Linux is a plus.

Responsibilities

• Manage mail flow for Exchange servers, perform upgrades, migrations, and hardware retirement.
• Work with email MTAs, SCOM, Virtual Machine Manager, IIS, and Octopus for automation.
• Troubleshoot SMTP and TLS issues and ensure reliable mail delivery.
• Participate in 24x7 on-call support rotation.

Skills

DNS

Active Directory

SMTP

TLS

Load Balancing

Networking

Virtualization

Cybersecurity

Azure

MS SQL

Linux (nice to have)

Education

Bachelor’s degree in Information Systems or equivalent experience

Tools

Octopus

Ansible

Job description

OpenText, a global leader in information management, is seeking a Sr. Windows System Administrator (Email Server) in Mississauga, ON.

This full-time, on-site position supports Windows Server environments, Exchange mail flow, and virtualization technologies to drive secure, reliable messaging infrastructure. You will manage Hyper‑V/VM Manager, Azure, DNS, AD, and SQL, perform server upgrades, migrations, and patching, and partner with development teams to deploy new services.