Posted last month
Senior Systems & Network Administrator (Windows, Linux, Cisco & F5)
@ CGI
Toronto, Ontario
Overview
CGI is hiring a Senior Systems & Network Administrator for its Infrastructure & Operations team to administer, monitor and support enterprise Windows, Linux, virtualization, network, firewall and load balancing environments. The role keeps critical business systems available, reliable, secure and performing well while supporting projects and incident and change management. It is a full-time hands-on position in a fast-paced enterprise setting.
Responsibilities:
- Administer and maintain Windows and Linux servers
- Manage network, firewall and load balancing environments
- Monitor systems to ensure availability and performance
- Support incident, change and project work
Requirements summary:
- Strong server administration expertise
- Network infrastructure and Cisco experience
- Virtualization technology knowledge
- Experience with F5 and firewall technologies
Tools & skills
Source and dates
Source type not verified · njoyn
- Employer posting date
- 2026-10-05
- First seen by our source
- 2026-10-17
- Source record updated
- 2026-10-17
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Seniority | Senior |
| Department | IT |
| Hours per week | 40 (estimated) |
| Travel | air: none · ground: none |
| Work setting | Office, Client sites |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
Summary and details written by AI from the posting; the employer’s posting is the authority.
CGI
| Field | Value |
|---|---|
| Company size | 10001+ |
| Headquarters | E-Commerce Place |
| Open jobs on Jobsy | 514 |
We are seeking a highly skilled Senior Systems & Network Administrator to join our Infrastructure & Operations team. This role is responsible for the administration, maintenance, monitoring, and support of enterprise Windows, Linux, virtualization, network, firewall, and load balancing environments.
The successful candidate will possess strong technical expertise in server administration, network infrastructure, virtualization technologies, and operational support processes. This individual will play a key role in ensuring the availability, reliability, security, and performance of critical business systems while supporting projects, incident management, change management, and continuous improvement initiatives.
This position requires a hands-on infrastructure professional capable of supporting server, network, and security technologies in a fast-paced enterprise environment.
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