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Added 13 mins ago
RP
Inside Sales Professional
Reliable Parts Ltd.
Montreal, QC
- Full-time
Each Monday, support the Call Center by answering inbound customer service calls, taking orders, answering questions, and resolving customer issues.
Added 13 mins ago
M
HVAC Branch Representative
Master
Kelowna, BC
- Full-time
…internal relationships with customers, providing excellent customer service, processing orders and quotations, and promoting company products to generate increased sales. You will also work…
Added 13 mins ago
A
Lead Hand Technician
AFL
Victoria, BC
- Full-time
…across Canada. Our teams work together to provide dependable service while maintaining a strong focus on safety, quality, accountability, and the customer…
Added 43 mins ago
AI
Bilingual QE Engineer – Contact Center Tools
Astra-North Infoteck Inc. ~ Conquering today’s challenges, achieving tomorrow’s vision!
Toronto, ON
- Full-time
Provide technical leadership for maintenance releases, enhancements, and ongoing support activities.
Added 43 mins ago
AI
Technical Lead – IVR & Contact Center Applications
Astra-North Infoteck Inc. ~ Conquering today’s challenges, achieving tomorrow’s vision!
Toronto, ON
- Full-time
Experience in contact flow design, call routing, self-service solutions, and speech recognition.
Added 43 mins ago
SAP Client Delivery Manager
NTT DATA Services
Toronto, ON
The Customer Delivery Manager (CDM) is the personal point of contact for all ECS customers, managing and coordinating all account activities with internal stakeholders and customers. The…
Added 58 mins ago
AC
Coordonnateur Des Opérations MRO/ MRO Operations Coordinator
Aston Carter
Dorval, QC
- $55,000 CAD / year
- Full-time
…will issue Returned Goods Authorizations (RGAs) and coordinate service workflows, ensuring a seamless process. Your role involves collecting and documenting equipment failure details from…
Added 1 hour ago
BI
Estimator
BEHLEN Industries LP
Brandon, MB
- Full-time
…cost estimates based on the evaluation and interpretation of customer supplied information. Through this process our Estimators are required to work within code requirements, proper…
Added 1 hour ago
G
Benefits Producer
Gallagher
Mississauga, ON
- $120,000 to $170,000 USD / year
- Full-time
Introducing Gallagher’s full-service offering to broaden the scope and impact of client relationships You will convey deep technical expertise and business insight in helping clients…
Added 1 hour ago
G
Benefits Producer
Gallagher
Waterloo, ON
- $120,000 to $170,000 USD / year
- Full-time
Introducing Gallagher’s full-service offering to broaden the scope and impact of client relationships You will convey deep technical expertise and business insight in helping clients…
Added 1 hour ago
RP
Business Development Executive
RJ Power
ON · Chatham-Kent, ON
- Full-time
Conduct market research to understand industry trends, competitive landscape and customer needs
Added 1 hour ago
R
Associate, merchandising service
RONA
Longueuil, QC
- Full-time
…ensuring compliance with visual standards. By putting your technical skills to good use, you'll benefit from ongoing training and stimulating challenges in a dynamic environment, while…
Added 1 hour ago
CI
Spécialiste des applications cliniques, Rayons X et mammographie (AB ou Manitoba) - Clinical Application Specialist, X-ray & Mammography (AB or Manitoba)
Christie Innomed
AB · Alberta, Canada
- Full-time
Avec plus de 250 spécialistes au service de plus de 1 500 hôpitaux et cliniques partout au Canada, Christie Innomed est un chef de file dans le domaine des dispositifs médicaux et de…
Added 1 hour ago
WM
Operations manager
Westcliff Management Ltd
AB · Edmonton, AB
- Full-time
…centre. The role provides leadership to the operations team and service contractors while ensuring exceptional customer and tenant experiences, efficient building performance, regulatory…
Added 1 hour ago
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Dispensing optician
JobsMedia.io
Montreal, QC
- Full-time
Technical college diploma (DEC) or a foreign diploma deemed equivalent
Added 1 hour ago
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Construction estimator
Mongrain
Mirabel, QC
- Full-time
Passionate about customer service and sales-oriented;
Added 1 hour ago
J
Personal Lines Account Manager
JobsMedia.io
Toronto, ON
- Internship
We are seeking a Personal Lines Account Manager who excels in providing comprehensive client service. In this role, you will manage a portfolio of accounts and support clients with their…
Added 1 hour ago
SI
Electrical Estimator
Synectics Inc.
Calgary, AB
- $70,000 to $90,000 CAD / year
- Full-time
…fast-paced environment. The successful candidate will possess strong technical knowledge of electrical systems, excellent estimating skills, and the ability to manage multiple…
Added 1 hour ago
IW
Coordinator, Region Office Operations, Kelowna, BC
IG Wealth Management
BC · British Columbia, Canada
- Full-time
Client service orientation – Understanding and addressing the needs and perspectives of internal and external clients
Added 1 hour ago
LB
Trader, Fixed Income
Laurentian Bank
Montreal, QC
- Full-time
…procedures while maintaining a high level of professionalism and technical…
Added 1 hour ago
TH
Diagnostic Imaging Assistant (Temporary Part-Time)
Trillium Health Partners
Mississauga, ON
- Part-time
Mitigate patient concerns stemming from imaging-related issues and communicate delay in exam performance, technical issues and/or reporting delays to staff and physicians.
Added 1 hour ago
W
Facility Assistant
Worley
Markham, ON
- Full-time
Monitor service requests and follow through to completion.
Added 1 hour ago
P&
Stage - Hiver 2027 - Service Numériques pour les Moteurs – Développeur logiciel/ Internship - Winter 2027 Digital Engine Services (DES) – Ground cloud software developer
Pratt & Whitney
Longueuil, QC
- Full-time
Travailler au sein de l’équipe de Service Numériques pour les Moteurs (DES) – Logiciels de Station au sol responsable de l’ingestion des données de diagnostic du moteur et de surveillance…
Added 1 hour ago
LC
Pharmacy Assistant, Hourly Part Time Day
Loblaw Companies Limited
St. John's, NL · Greater St. John's Metropolitan Area
- Part-time
To assist with the technical functions of dispensing prescriptions, assist as appropriate in the delivery of pharmacy services and participate in the maintenance and operations of the…
Added 1 hour ago
LC
Pharmacy Assistant, Hourly Part Time Day
Loblaw Companies Limited
Lethbridge, AB
- Part-time
To assist with the technical functions of dispensing prescriptions, assist as appropriate in the delivery of pharmacy services and participate in the maintenance and operations of the…

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 5, 2026
Posting language: English
Posted: Oct 6, 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 mentoring 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, 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
Python
PowerShell

Benefits

Professional Development Support
Certification Support
Flexible Work Options

Visa sponsorship

Not detected in the job text

Keywords

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

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