Systems & Network Administrator

STACK IT Recruitment•Vaughan, ON

11h•CA$90,000 - CA$110,000•Onsite

About The Position

Our client, a rapidly growing healthcare technology company supporting clinics across Canada and the U.S., is seeking a Systems & Network Administrator to help strengthen and scale their IT operations. In this role, you’ll take ownership of hybrid infrastructure spanning on-prem and cloud environments, ensuring performance, reliability, and automation at every level. From virtualization and networking to CI/CD and system monitoring, you’ll play a key role in maintaining a secure, high-availability environment that supports critical business systems.

Requirements

4+ years of hands-on experience in systems administration, network administration or infrastructure engineering
Strong understanding of Linux server administration (required), with experience managing Windows environments
Strong networking knowledge, including TCP/IP, routing, switching, VLANs, DNS, DHCP, VPNs, load balancers, and enterprise firewall administration
Proven skills in virtualization platforms such as VMware and Proxmox
Hands-on experience configuring and troubleshooting network infrastructure, including Cisco networking equipment, pfSense firewalls, and high-availability networking solutions
Experience implementing infrastructure and network security best practices, including segmentation, access controls, and secure remote connectivity
Experience working in cloud environments (Azure preferred), including hybrid or multi-site architectures
Experience managing databases (MySQL, MongoDB, SQLite) for performance and reliability
Strong analytical and troubleshooting abilities with a focus on uptime, efficiency, and scalability
Excellent documentation, communication, and collaboration skills
A proactive mindset, always looking for opportunities to improve reliability and automate repetitive tasks

Responsibilities

Manage and maintain VMware, Proxmox, and Azure environments to ensure a stable, secure, and scalable infrastructure.
Administer and optimize enterprise network infrastructure, including switches, routers, firewalls, VLANs, VPNs, and wireless connectivity to ensure reliable network performance.
Configure and maintain pfSense, HAProxy, Cisco networking devices, and core network services (DNS, DHCP) to support high availability and secure connectivity.
Implement and maintain network security best practices, including firewall policies, segmentation, access controls, and secure remote connectivity.
Automate infrastructure provisioning, configuration, and deployments using Ansible and related automation tools.
Oversee server hardware, NAS, and backup solutions, ensuring redundancy, disaster recovery, and data protection.
Administer and optimize Linux and Windows servers, performing patching, performance tuning, and troubleshooting across both systems and network environments.
Deploy and manage Docker and Kubernetes environments, improving application scalability and microservices performance.
Monitor infrastructure and network health using Grafana, Prometheus, and Zabbix, implementing proactive alerting, logging, and performance monitoring.
Manage and maintain MySQL, MongoDB, and SQLite databases with a focus on reliability, replication, backup, and performance optimization.