HPC System Administrator

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Telesat (Nasdaq and TSX: TSAT) is a leading global satellite operator, providing reliable and secure satellite‑delivered communications solutions worldwide to broadcast, telecommunications, corporate and government customers for over 55 years. Backed by a legacy of engineering excellence, reliability and industry‑leading customer service, Telesat has grown to be one of the largest and most successful global satellite operators.

Telesat Lightspeed, our revolutionary Low Earth Orbit (LEO) satellite network, scheduled to begin service in 2027, will revolutionize global broadband connectivity for enterprise and Government users by delivering a combination of high capacity, security, resiliency and affordability with ultra‑low latency and fiber‑like speeds. Telesat is headquartered in Ottawa, Canada, and has offices and facilities around the world.

The company’s state‑of‑the‑art Satellite fleet consists of 14 GEO satellites, the Canadian payload on Via Sat‑1 and one LEO 3 demonstration satellite. For more information, follow Telesat on X and Linked In or visit

Reporting to the Manager, Systems, the incumbent provides the technical leadership and specialist expertise required for the operation and support of the Constellation Management System/System Model running within a high‑performance compute environment (HPC). The candidate’s primary focus is to monitor, maintain, troubleshoot and support HPC nodes which are integral to the day‑to‑day operation of the company. These activities include managing the hardware, software installations and configuration, optimization and management of the environment.

Other activities include operational, day‑to‑day requests including migration of nodes, system access requests, resolution of security alerts, and providing second level problem assessment, triage, research, and resolution of incidents and requests, and capable of applying technical expertise at a superior level. Assist with the creation and publication of end user documentation as new technology is released and systems are migrated.

Candidates must be willing to be onsite in the office at least 4 days per week.

• Identify, diagnose, and resolve level two problems for users of the software and hardware, LAN and WAN, VPN, the Internet, mobile devices, and new computer technology; communicate solutions to end‑users.
• Respond to more complex issues (second line support) escalated by the first line support using problem‑solving skills and analysis to identify root causes of issues, determine course of action and propose creative solutions.
• Manage day‑day operations and support of the HPC environment (Linux).
• Take ownership of capacity, availability and performance of the HPC cluster(s).
• Support end users in the submission and management of jobs based on Slurm and OpenHPC.
• Migrate existing nodes as required to Linux.
• Implement and manage a system based on Foreman or similar to manage patching and oversee cluster management.
• Implement patches and upgrades to Linux, Slurm and OpenHPC as required.
• Install new servers and storage, build new clusters, configure and manage Linux distributions, hypervisors (KVM) and tooling.
• Automate where possible to increase efficiency of operations.
• Execute upon firewall access requests to the environment.
• Escalate priority support issues to senior staff and/or other corporate technology groups.
• Collect and document all relevant information prior to escalation to allow senior staff to operate efficiently.
• Document, track and monitor problems to ensure timely resolution.
• Assist in tracking helpdesk calls pertaining to application, networking, and systems problems and issues.
• Assign username, password and access right permissions for multiple proprietary applications, as well as client software.
• Identity Management and multifactor authentication with integration between Active Directory and Linux platforms.
• Perform hardware & software audits.
• Product research and evaluation.
• Provide emergency support on incidents as required.
• Perform occasional after‑hours maintenance.
• Incident on‑call rotation as required.
• Day‑to‑day…