Full-time

Senior System Administrator

Posted by Leaders Recruiting • Markham, Ontario, Canada

📍 Markham, Ontario 🕒 February 24, 2026

About the Role

Location:

Markham

The System Administrator is responsible for the maintenance, configuration, and reliable operation of the organization’s computer systems and servers. You will install hardware and software and participate in research and development to continuously improve and keep up with the IT business needs of the organization.

Responsibilities:

  • Manage daily, weekly, monthly & quarterly administration tasks

  • Active directory management & optimization

  • Group policy configuration & deployment

  • Server build & configuration; Advanced server admin knowledge

  • Patch management – endpoint patching/critical updates

  • Office – advanced knowledge of O Administration

  • Formulate policy & process re technical administration

  • Application support

  • Project execution

  • Implementation – upgrades, migrations etc.

  • Manage back-ups – daily back-up logging, m...
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