Senior Network & Systems Administrator

Reporting to the IT Lead, the incumbent is a senior technical contributor responsible for the proper operation, security, and evolution of the company’s network infrastructure, servers, workstations, software, and peripherals. More specifically, the incumbent will:

• Diagnose and resolve incidents, and provide escalation support to users regarding equipment and software

• Contribute to the development, technical design, implementation, training, and maintenance of systems

• Install, test, and update computer equipment (computers, servers, peripherals, programs, and software)

• Maintain the security, administration, and day-to-day operation of the equipment

Network Administration

• Maintain LAN/WAN infrastructure, including switches, routers, firewalls, VPNs, and wireless networks (Fortinet, Cisco and HPE Aruba equipment)

• Manage network segmentation, VLANs, and routing protocols (BGP, OSPF)

• Monitor network performance, troubleshoot complex issues, and perform capacity planning

• Oversee structured cabling and fiber connectivity in on-premises server rooms, including during the transition to the cloud

Systems Administration

• Administer Windows Server and Linux environments (physical and virtual)

• Manage virtualization platforms (Hyper-V or Proxmox) and cloud resources (Azure and AWS)

• Maintain Active Directory, Entra ID, Group Policy, DNS, DHCP, and identity and access management

• Handle patch management, configuration management, and lifecycle planning

Security & Resilience

• Implement and enforce security best practices, including hardening, access controls, and vulnerability remediation

• Configure, maintain, and regularly test backup, disaster recovery, and business continuity solutions

• Support audits and compliance requirements

• Respond to and document security incidents

Automation & Operations

• Automate repetitive tasks

• Maintain monitoring and alerting systems

• Create and maintain clear documentation, procedures, runbooks, and network diagrams

• Maintain an inventory of all IT components in the organization

• Participate in an on-call rotation (every other week) to resolve critical incidents remotely outside office hours

Leadership

• Mentor less experienced team members and contribute to technical standards

• Evaluate new technologies and recommend improvements

Requirements

• College diploma (DEC) or Attestation of College Studies (AEC) in computer science

• 10+ years of global experience in network and/or systems administration, including at least 2 years in a senior or technical-lead capacity

• Experience in a multi-site environment

• Strong knowledge of TCP/IP, switching, routing (including BGP and OSPF), firewalls, and VPN technologies

• Experience with Fortinet, Cisco and Aruba technology

• Strong experience with Windows Server/Workstation and Linux administration

• Strong experience with cloud providers (Azure and AWS), including migrating on-premises workloads to the cloud

• Strong knowledge of Active Directory and Entra ID

• Background in regulated or high-availability environments

• Experience with virtualization and backup/disaster recovery solutions

• Proficiency in at least one scripting language (PowerShell, Python, or Bash)

• Excellent written and verbal communication

• Availability to be on call every other week and to resolve critical incidents remotely outside office hours

• Ability to communicate in French and English; Spanish is an asset

Abilities

• Good ability to analyze and synthesize processes

• Ability to work as part of a team in a multicultural environment

• Ability to work on-site at the office five days a week

• Ability to travel overseas

• Concern for customer service and quality of work

• Thoroughness and attention to detail

• Autonomy and initiative

• Organizational skills and adaptability