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ALFACONSEIL.CA

Administrateur·rice systèmes senior – Senior Systems Administrator

Bas-Saint-Laurent, QC, Canada

Full-time

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Job details

Job type: Full-time
Apply by: Nov 27, 2026
Posting language: English · French
Posted: Oct 28, 2026

Original job description

English section of this bilingual listing.

The successful candidate will play a key role in Windows Server administration, cloud resource management, access security and network infrastructure maintenance. They will also contribute to operational improvements, task automation and the resolution of complex technical issues.

This opportunity is well suited to an autonomous and versatile professional who enjoys both day-to-day infrastructure operations and the optimization, security and evolution of technology environments.

Key responsibilities

Administer, maintain and patch Windows Server 2016, 2019 and 2022 environments to ensure availability, performance and stability.
Manage AWS and Azure cloud environments, including virtual machines, storage, virtual networks and resource groups.
Administer Active Directory, Group Policy Objects (GPOs) and identity and access management mechanisms.
Manage and secure Microsoft 365 services, including Exchange Online, SharePoint and Teams.
Configure, maintain and troubleshoot network components, including firewalls, switches, routers, VPNs, DNS and DHCP.
Support network security solutions, including Zscaler and Zero Trust Network Access (ZTNA) technologies.
Monitor infrastructure health, apply security best practices and ensure that backup processes are maintained.
Contribute to disaster recovery planning and testing to strengthen infrastructure resilience.
Act as an escalation point for complex incidents, perform root cause analysis and implement lasting corrective measures.
Maintain accurate documentation of network architecture, server configurations and operational procedures.
Identify automation opportunities and contribute to improving infrastructure processes and operations.
Collaborate with IT teams to support operational requirements and the ongoing evolution of technology environments.

Required qualifications

At least 5 years of experience in IT infrastructure administration or a comparable systems administration role.
Strong expertise in Windows Server, Active Directory and Group Policy.
Hands-on experience managing AWS and Azure production environments.
Solid understanding of TCP/IP, VLANs, VPNs and LAN/WAN troubleshooting.
Experience administering Microsoft 365 environments.
Experience with Zscaler and a good understanding of ZTNA concepts and solutions.
Knowledge of network hardware, including routers, switches and firewalls.
Ability to troubleshoot complex issues, identify root causes and recommend sustainable solutions.
Strong organizational skills, autonomy and the ability to manage competing priorities in a demanding operational environment.
Ability to document technical work and collaborate effectively with different technical teams.

Preferred qualifications

Experience automating infrastructure tasks using PowerShell or Bash.
Familiarity with industrial environments involving programmable logic controllers (PLCs) or operational technology (OT).
Relevant certifications, such as Microsoft Azure Administrator, AWS Certified Solutions Architect or equivalent.

Read the full bilingual original

La personne titulaire du poste jouera un rôle clé dans l’administration des serveurs Windows, la gestion des ressources infonuagiques, la sécurité des accès et le maintien des infrastructures réseau. Elle contribuera également à l’amélioration continue des opérations, à l’automatisation des tâches récurrentes et à la résolution de problèmes techniques complexes.

Ce poste s’adresse à une personne autonome et polyvalente, qui aime intervenir autant dans l’exploitation quotidienne des infrastructures que dans leur optimisation, leur sécurisation et leur évolution.

Responsabilités

Administrer, maintenir et mettre à jour les environnements Windows Server 2016, 2019 et 2022 afin d’assurer leur disponibilité, leur performance et leur stabilité.
Gérer les environnements infonuagiques AWS et Azure, notamment les machines virtuelles, le stockage, les réseaux virtuels et les groupes de ressources.
Administrer Active Directory, les stratégies de groupe (GPO) et les mécanismes de gestion des identités et des accès.
Assurer l’administration et la sécurisation de Microsoft 365, notamment Exchange Online, SharePoint et Teams.
Configurer, maintenir et dépanner les composantes réseau, incluant les pare-feu, les commutateurs, les routeurs, les VPN, le DNS et le DHCP.
Contribuer à la gestion des solutions de sécurité réseau, notamment Zscaler et les mécanismes d’accès réseau Zero Trust (ZTNA).
Surveiller l’état des infrastructures, appliquer les bonnes pratiques de sécurité et veiller à la réalisation des sauvegardes.
Participer à la planification et aux essais de reprise après sinistre afin de renforcer la résilience des environnements.
Agir comme personne-ressource lors d’incidents complexes, réaliser des analyses de causes racines et mettre en place des mesures correctives durables.
Documenter les architectures réseau, les configurations des serveurs et les procédures d’exploitation.
Identifier les possibilités d’automatisation et contribuer à l’amélioration des processus et des opérations d’infrastructure.
Collaborer avec les équipes TI afin de soutenir les besoins opérationnels et l’évolution des environnements technologiques.

Profil recherché

Minimum de 5 ans d’expérience en administration d’infrastructures TI ou dans un rôle comparable en administration de systèmes.
Expertise en administration de Windows Server, Active Directory et stratégies de groupe (GPO).
Expérience pratique en gestion d’environnements de production sur AWS et Azure.
Bonne compréhension des réseaux TCP/IP, des VLAN, des VPN et du dépannage des environnements LAN et WAN.
Expérience en administration d’un environnement Microsoft 365.
Expérience avec Zscaler et bonne connaissance des concepts et solutions ZTNA.
Connaissance des équipements réseau, notamment les routeurs, les commutateurs et les pare-feu.
Capacité à diagnostiquer des problèmes complexes, à identifier les causes racines et à proposer des solutions durables.
Autonomie, rigueur et capacité à gérer plusieurs priorités dans un environnement opérationnel exigeant.
Facilité à documenter les interventions et à collaborer avec différentes équipes techniques.

Atouts

Expérience en automatisation de tâches d’infrastructure avec PowerShell ou Bash.
Connaissance des environnements industriels intégrant des automates programmables (PLC) ou des technologies opérationnelles (OT).
Certifications pertinentes, notamment Microsoft Azure Administrator, AWS Certified Solutions Architect ou équivalent.

______________________________________

Key responsibilities

Administer, maintain and patch Windows Server 2016, 2019 and 2022 environments to ensure availability, performance and stability.
Manage AWS and Azure cloud environments, including virtual machines, storage, virtual networks and resource groups.
Administer Active Directory, Group Policy Objects (GPOs) and identity and access management mechanisms.
Manage and secure Microsoft 365 services, including Exchange Online, SharePoint and Teams.
Configure, maintain and troubleshoot network components, including firewalls, switches, routers, VPNs, DNS and DHCP.
Support network security solutions, including Zscaler and Zero Trust Network Access (ZTNA) technologies.
Monitor infrastructure health, apply security best practices and ensure that backup processes are maintained.
Contribute to disaster recovery planning and testing to strengthen infrastructure resilience.
Act as an escalation point for complex incidents, perform root cause analysis and implement lasting corrective measures.
Maintain accurate documentation of network architecture, server configurations and operational procedures.
Identify automation opportunities and contribute to improving infrastructure processes and operations.
Collaborate with IT teams to support operational requirements and the ongoing evolution of technology environments.

Required qualifications

At least 5 years of experience in IT infrastructure administration or a comparable systems administration role.
Strong expertise in Windows Server, Active Directory and Group Policy.
Hands-on experience managing AWS and Azure production environments.
Solid understanding of TCP/IP, VLANs, VPNs and LAN/WAN troubleshooting.
Experience administering Microsoft 365 environments.
Experience with Zscaler and a good understanding of ZTNA concepts and solutions.
Knowledge of network hardware, including routers, switches and firewalls.
Ability to troubleshoot complex issues, identify root causes and recommend sustainable solutions.
Strong organizational skills, autonomy and the ability to manage competing priorities in a demanding operational environment.
Ability to document technical work and collaborate effectively with different technical teams.

Preferred qualifications

Experience automating infrastructure tasks using PowerShell or Bash.
Familiarity with industrial environments involving programmable logic controllers (PLCs) or operational technology (OT).
Relevant certifications, such as Microsoft Azure Administrator, AWS Certified Solutions Architect or equivalent.

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More about this job

Responsibilities

Administer and secure Windows Server, AWS, Azure, Microsoft 365, identity, and network environments, while maintaining infrastructure availability, backups, and disaster recovery readiness. Resolve complex incidents, document systems and procedures, and improve infrastructure operations through automation and collaboration with IT teams.

Requirements

Requires at least five years of IT infrastructure or systems administration experience, with strong expertise in Windows Server, Active Directory, Group Policy, AWS, Azure, Microsoft 365, and networking. Candidates should also have Zscaler and ZTNA experience, strong troubleshooting and documentation abilities, and the autonomy to manage competing priorities; automation experience, industrial OT familiarity, and relevant certifications are preferred.

Skills

Windows Server Administration
AWS
Microsoft Azure
Active Directory
Group Policy
Microsoft 365
Network Administration
TCP/IP
VPN
Zscaler
Zero Trust Network Access
Disaster Recovery
Root Cause Analysis
PowerShell
Bash
Infrastructure Automation

Visa sponsorship

Not detected in the job text

Keywords

Windows Server 2016
Windows Server 2019
Windows Server 2022
AWS
Microsoft Azure
Virtual Machines
Cloud Storage
Virtual Networks
Active Directory
Group Policy Objects
Identity and Access Management
Microsoft 365
Exchange Online
SharePoint
Microsoft Teams
TCP/IP
VLAN
VPN
DNS
DHCP
Firewalls
Routers
Switches
Zscaler
Zero Trust Network Access
Backup
Disaster Recovery
Root Cause Analysis
PowerShell
Bash

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