Sr. IT System

Job Summary:

Reporting to the Infrastructure Manager, the Sr. IT System & Network Administrator is a senior technical and delivery-focused role responsible for architecting, implementing, and evolving on‐premise, hybrid, and cloud-based infrastructures. This role goes beyond day‐to‐day administration and acts as a technical lead for complex infrastructure initiatives, with full end‐to‐end responsibility including analysis, design, implementation, documentation, knowledge transfer, and operational handover.

The Sr. IT System & Network Administrator is expected to demonstrate strong leadership in cloud platforms, infrastructure as code, security best practices, and cross‐functional project coordination. They serve as a technical reference for Infrastructure and Support teams while ensuring that infrastructure solutions align with business, security, and compliance requirements.

Key Responsibilities:

Cloud & Hybrid Infrastructure LeadershipDesign, deploy, and manage cloud and hybrid infrastructures (IaaS, PaaS, hybrid connectivity) aligned with business and security requirements.

Lead architecture decisions related to cloud networking, identity, access management, backup, disaster recovery, monitoring, and cost optimization.

Define and enforce infrastructure standards, naming conventions, network segmentation, and security baselines across cloud and on‐prem environments.

Ensure high availability, scalability, performance, and resilience of critical systems. End‐to‐End Project Management: Own infrastructure projects from initiation to closure, including requirements gathering, solution design, effort estimation, risk identification, execution, and post‐project review.

Act as the technical project lead for infrastructure initiatives involving internal teams and external partners.

Coordinate dependencies across Infrastructure, Helpdesk, Security, Development, and third‐party vendors.

Ensure deliverables meet scope, quality, timeline, and documentation expectations.

Advanced Systems & Network AdministrationAdminister and optimize complex server, storage, virtualization, and network environments.

Lead implementation of advanced networking concepts (segmentation, firewalls, VPNs, secure remote access, multi‐site connectivity).Oversee identity and access management solutions, including MFA and privileged access controls.

Drive automation initiatives for provisioning, monitoring, configuration management, and reporting.

Security, Compliance & ReliabilityIntegrate security best practices into infrastructure design and operations (zero trust principles, least privilege, secure configurations).Support compliance requirements from external regulators, certifications, and regional authorities.

Define and test backup, disaster recovery, and business continuity strategies.

Proactively identify risks, technical debt, and opportunities for infrastructure improvement.

Documentation, Standards & Knowledge TransferProduce clear, structured, and reusable documentation for architectures, deployments, procedures, and operational runbooks.

Ensure a smooth transition of delivered solutions to operations and support teams. Mentor and provide technical guidance to junior administrators and analysts.

Contribute to the continuous improvement of IT standards, tools, and operating practices. RÉSUMÉ DU POSTE :Relevant du gestionnaire de l'infrastructure, l'administrateur principal ou l'administratrice principale des systèmes et des réseaux TI occupe un rôle technique de haut niveau axé sur la livraison et responsable de l'architecture, de la mise en œuvre ainsi que de l'évolution des infrastructures sur site, hybrides et infonuagiques.

Ce poste dépasse le cadre de l'administration courante, et le ou la titulaire exerce un rôle de leadership technique dans le cadre d'initiatives d'infrastructure complexes, étant entièrement responsable du cycle de bout en bout, de l'analyse à la transition opérationnelle, en passant par la conception, la mise en œuvre, la documentation, le transfert des connaissances et la transition opérationnelle. L'administrateur principal ou l'administratrice principale des systèmes et des réseaux TI doit faire preuve de leadership affirmé en matière de plateformes infonuagiques, d'infrastructure en tant que code, de meilleures pratiques de sécurité et de coordination de projets interfonctionnels.

Il ou elle agit à titre de référence technique pour les équipes Infrastructure et Soutien, tout en s'assurant que les solutions d'infrastructure sont alignées avec les exigences d'affaires, de sécurité