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Added 15 mins ago
EM
Consultant - PySpark / Databricks Developer (Intermediate - Senior)
Electric Mind
Toronto, ON
- Full-time
…consumers via file exports and Kafka. You'll work alongside a senior engineer, writing transform code, fixing pipeline issues, and helping keep the environment healthy across…
Added 29 mins ago
KG
Senior Java Low Latency Developer (Payments & Trading Platforms)
K&K Global Talent Solutions INC.
Mississauga, ON
- Full-time
We are seeking an experienced Senior Java Low Latency Developer to join our Payments Processing Development team and help drive the evolution of our next-generation exchange connectivity…
Added 29 mins ago
SG
Senior Automation Engineer
Socomec Group
Brampton, ON
- Full-time
Socomec is seeking a Senior Automation Engineer to join our Energy Storage Systems (ESS) R&D team. This role will focus on the development, integration, testing, and commissioning of…
Added 29 mins ago
TT
Senior Electrical Engineer
Tetra Tech
Pickering, ON
- Full-time
We are currently seeking a Senior Electrical and I/C Engineer for our Pickering/Mississauga, Ontario offices. This posting is for an existing vacancy for which we are actively recruiting.…
Added 30 mins ago
IL
Senior Cloud Security Engineer
Invesco Ltd.
Charlottetown, PE
- $90,000 to $100,000 CAD / year
- Full-time
The Senior Cloud Security Engineer is responsible for securing Invesco's cloud, SaaS, AI, and data ecosystems through the implementation, operation, and continuous improvement of security…
Added 30 mins ago
Principal Engineer / Design Manager
Mott MacDonald
Toronto, ON
The Principal Engineer / Design Manager is a key member of the senior leadership team on a Major Project, responsible for ensuring the technical integrity, coordination, and successful…
Added 45 mins ago
LC
Senior Engineer, Application Security
Lightspeed Commerce, Inc.
Remote, Canada
- Full-time
- Remote
As a Senior Application Security Engineer, you will serve as a foundational anchor on the AppSec team, leading our strategic shift hard-left toward developer-embedded security and Secure by…
Added 59 mins ago
I
QA Automation Engineer - ETL/Database
Infoya
Toronto, ON
- $100,000 to $115,000 CAD / year
- Full-time
About the Job: Infoya is looking for an experienced Senior Automation Engineer with strong expertise in test automation , database testing, ETL validation, and data pipeline testing. The…
Added 59 mins ago
E
Senior QE + AI Engineer
enableIT
Toronto, ON
- $75 to $80 CAD / hour
- Contract
We are seeking a Senior QE + AI Engineer with around 8 years of experience in Quality Engineering, Test Automation, or Software Engineering. The role focuses on building AI-powered…
Added 59 mins ago
I
QA Automation Engineer - Database & ETL Testing
Infoya
Toronto, ON
- $100,000 to $115,000 CAD / year
- Full-time
About the Job: Infoya is looking for an experienced Senior Automation Engineer with strong expertise in test automation , database testing, ETL validation, and data pipeline testing. The…
Added 59 mins ago
TC
Java Fullstack Developer
TSR Consulting
Mississauga, ON
- Full-time
We are seeking a Senior Software Engineer - Java - Senior (C13), Full Stack to join our dynamic team. The ideal candidate will have strong experience in Java, Spring Boot, Spring Cloud,…
Added 59 mins ago
W
Principal, Energy and Carbon Solutions
WalterFedy
Hamilton, ON
- Full-time
The Principal, Energy and Carbon Solutions plays a critical leadership role in advancing technical excellence, client delivery, and sustainable growth within our ECS (Energy and Carbon…
Added 59 mins ago
HO
Structural Design Engineer (Intermediate)
Hydro One
Toronto, ON
- Full-time
Assist senior engineers on projects involving greater complexity and provide technical guidance to supporting staff as required.
Added 1 hour ago
HS
Senior Software Engineer, Dentrix Ascend
Henry Schein One UK
Surrey, BC
- Full-time
We are looking for a Senior Software Engineer to join our True North team and help build and evolve Dentrix Ascend for the US market.
Added 1 hour ago
FI
Senior Simulation Scientist
Fulfillment IQ
Remote, Canada
- Full-time
- Remote
Workbench is FIQ's warehouse-design platform: it lets a solutions engineer draw a warehouse the way an architect draws a building. You will design, build and own Workbench’s warehouse…
Added 1 hour ago
I
QA Automation Engineer - ETL/Database
INFOYA
Toronto, ON
- $100,000 to $115,000 CAD / year
- Full-time
experienced Senior Automation Engineer with strong expertise
Added 1 hour ago
A
Senior Electrical Engineer
AECOM
Kitchener, ON
- $110,000 to $130,000 CAD / year
- Full-time
AECOM's Architectural Business unit Buildings + Places Canada (B+P Canada) is actively seeking a Senior Electrical Engineer for immediate employment. The role can be based out of any of our…
Added 2 hours ago
MI
Senior Buyer
Magna International
Toronto, ON
- Full-time
Cosma provides a comprehensive range of body, chassis and engineering solutions to global customers. Through our robust product engineering, outstanding tooling capabilities and diverse…
Added 4 hours ago
A
Senior Process Engineer
Airswift
Calgary, AB
- Contract
A Senior Process Engineer is being sought for a full-time position supporting oil & gas projects in a dynamic engineering environment. This is an opportunity to contribute to a range of…
Added 5 hours ago
Highway Manager, Senior
Hatch
Vancouver, BC
…bettering the industries in which we operate. With practical solutions that are safe, innovative and sustainable, we think globally while acting locally. Are you looking for an opportunity…
Added 5 hours ago
AN
Senior Airport Electrical Engineer
Avia NG Airport Consultants
Calgary, AB
- $120,000 to $170,000 CAD / year
- Full-time
- On-site
…fuels our success. We are currently seeking a client-oriented Senior Airport Electrical Engineer to join our Airfield Electrical Engineering Team. What are the perks? Working with us of…
Added 6 hours ago
P
Senior Mobile Engineer
Pentasia
Toronto, ON
- $140,000 to $180,000 CAD / year
- Full-time
An innovative, early-stage technology company in the sports, gaming, and digital entertainment space is seeking a Senior React Native Engineer to help build and scale its mobile platform…
Added 7 hours ago
A
Senior Mechanical Test Engineer
Actalent
Vancouver, BC
- $48 to $57 CAD / hour
- Contract
The Senior Mechanical Test Engineer will support new product development by leading and executing design verification activities for complex mechanical and electromechanical products. This…
Added 7 hours ago
UO
Electro-Optical Engineer Intern
University of Alaska Fairbanks Petroleum Engineering
Engineer, BC
- Volunteer
The Strategic Military Space Division is looking for an exceptional Calibration and Test Engineer for a summer internship. Interns will be paid a competitive hourly wage and tasked with…
Added 7 hours ago
RT
Senior Data Architect
Ripotek Technologies Inc.
Calgary, AB
- Full-time
As a Senior Data Architect, you'll lead the design and implementation of modern data platforms for enterprise clients across Energy, Financial Services, and Public Sector. You'll work…

OnX

Sr. Engineer System administrator

Toronto, ON, Canada

Full-time

Apply About employer

Applications open in a new tab.

Job details

Job type: Full-time
Apply by: Nov 7, 2026
Posting language: English
Posted: Oct 8, 2026

Original job description

OnX is a leading Canadian technology solutions provider helping organizations modernize, secure, and optimize their IT environments. We partner with clients across industries to deliver innovative infrastructure, cloud, security, and managed services solutions that drive business success.

We are seeking a highly skilled Senior Systems Administrator to join our Infrastructure Services team. This role is ideal for a hands-on technical professional who thrives in complex enterprise environments and enjoys managing mission-critical server infrastructure across Windows, Linux, and cloud platforms.

What You'll Do

As a Senior Systems Administrator, you will be responsible for maintaining, optimizing, and securing enterprise server environments while ensuring the highest levels of performance, availability, and compliance.

Key Responsibilities

Administer and support enterprise Windows and Linux server environments.
Perform operating system installation, configuration, patching, upgrades, and lifecycle management.
Monitor system health, performance, and availability, proactively identifying and resolving issues.
Implement infrastructure improvements that enhance scalability, resiliency, and operational efficiency.
Manage enterprise security baselines, vulnerability remediation efforts, and system hardening activities.
Support cloud-based infrastructure across AWS and Microsoft Azure environments.
Automate operational processes using scripting and automation tools.
Collaborate with networking, security, application, and cloud teams to deliver integrated technology solutions.
Perform capacity planning and growth forecasting for server and compute environments.
Maintain technical documentation, operational procedures, and knowledge articles.
Mentor junior team members and provide technical guidance on infrastructure best practices.

Required Qualifications

Education

Bachelor's degree in Computer Science, Information Technology, Engineering, Telecommunications, or a related technical discipline.

Experience

6+ years of overall IT infrastructure experience.
5+ years of hands-on systems administration experience in enterprise environments.

Technical Skills

Required

Linux Administration
Windows Server Administration (Wintel)
Unix Administration
Infrastructure Monitoring and Troubleshooting
Operating System Patching and Maintenance
Performance Optimization
Security Hardening and Compliance
Server Lifecycle Management

Preferred

AWS Administration
Microsoft Azure Administration
Citrix XenServer
Sun Solaris
AS/400
WSUS
Python
Bash Scripting
PowerShell

Desired Competencies

Infrastructure Provisioning & Configuration Management
Performance Monitoring & Optimization
Virtualization Technologies
Automation & Scripting
Security & Compliance Management
Capacity Planning & Resource Management
Strong Problem-Solving Skills
Effective Communication
Ownership and Accountability
Collaboration and Teamwork
Customer-Focused Mindset

Success Measures

In this role, success will be measured through:

Infrastructure uptime and SLA achievement
Reduced incident resolution times (MTTR)
Security compliance and vulnerability remediation performance
Increased automation and operational efficiency
Adherence to infrastructure standards and governance practices

Why Join OnX?

Work with modern infrastructure and cloud technologies.
Collaborate with experienced technology professionals across Canada.
Gain exposure to enterprise-scale environments and strategic initiatives.
Competitive compensation and benefits package.
Professional development and certification support.
Flexible work options depending on role requirements.

CAD $62,000 – $82,000 base salary (not including bonus or commission)

The compensation range in this posting reflects the Company’s good‑faith estimate at the time of publication. The applicable base pay range for any individual will be determined based on the candidate’s designated primary work location as well as factors including role scope and responsibilities, required qualifications, and the individual’s experience, education, skills, knowledge, and performance. Certain positions may also be eligible for additional compensation such as discretionary merit increases, bonuses, or sales‑based variable compensation in accordance with applicable plans and role requirements.

Diversity & Inclusion

OnX is an equal opportunity employer committed to creating an inclusive environment for all employees. We celebrate diversity and are dedicated to fostering a workplace where everyone can thrive regardless of race, religion, gender, age, disability, sexual orientation, or any other protected characteristic.

Apply About employer

More about this job

Responsibilities

Administer, maintain, secure, and optimize enterprise Windows and Linux server environments, including operating system lifecycle management, monitoring, troubleshooting, and cloud infrastructure support across AWS and Azure. Improve infrastructure resilience and efficiency through automation, capacity planning, documentation, cross-team collaboration, and technical guidance for junior team members.

Requirements

Requires a bachelor's degree in Computer Science, Information Technology, Engineering, Telecommunications, or a related technical discipline, along with at least six years of overall IT infrastructure experience. Candidates must have at least five years of hands-on enterprise systems administration experience and skills in Linux, Windows Server, Unix, monitoring, patching, performance optimization, security hardening, and server lifecycle management.

Skills

Linux Administration
Windows Server Administration
Unix Administration
Infrastructure Monitoring
Troubleshooting
Operating System Patching
Performance Optimization
Security Hardening
Compliance Management
Server Lifecycle Management
AWS Administration
Citrix XenServer
Sun Solaris
AS/400
PowerShell

Benefits

Competitive Compensation
Professional Development
Certification Support
Flexible Work Options

Visa sponsorship

Not detected in the job text

Keywords

Enterprise Infrastructure
Systems Administration
Linux
Windows Server
Unix
AWS
Microsoft Azure
Citrix XenServer
Sun Solaris
AS/400
WSUS
Python
Bash
PowerShell
Infrastructure Monitoring
Operating System Patching
Security Hardening
Vulnerability Remediation
Compliance
Server Lifecycle Management
Automation
Configuration Management
Virtualization
Capacity Planning
Performance Optimization
Cloud Infrastructure
Incident Resolution
Infrastructure Governance

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