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Added 6 mins ago
FO
Senior Director, Enterprise Technology Services
Federation of Canadian Municipalities
Ottawa, ON · Greater Ottawa Metropolitan Area
- Full-time
Reporting to the Chief Operating Officer, the Senior Director, Enterprise Technology Services provides enterprise leadership for FCM's technology strategy, digital platforms, cybersecurity,…
Added 6 mins ago
R
Bilingual Senior HR Business Partner – Corporate Groups
Radio-Canada
Toronto, ON
- Full-time
Reporting to the Senior Manager, HR, you will be a key member of the People & Culture team, providing strategic Human Resources and Industrial Relations (HR/IR) consultation and operational…
Added 6 mins ago
S
Artificial Intelligence Consultant
SMARTFOX
Canada
- Full-time
Senior AI Consultant - 5+ years : Leading engagements, shaping AI strategy for clients, scoping and selling work, setting technical and ethical standards, developing the team
Added 6 mins ago
R
Integrated Account Lead
Radio-Canada
Toronto, ON
- Full-time
…strategies. This role requires demonstrated experience and senior-level client-based relationships to successfully negotiate and sell-through broadcast and digital media and innovative…
Added 6 mins ago
CN
Director, Governance and Controls
Canadian Nuclear Laboratories
Chalk River, ON
- Full-time
Acting as a senior authority for governance-related decisions and compliance matters.
Added 6 mins ago
C
Senior Cloud / AI Developer - Train Control , OT
CN
Quebec, QC
- Full-time
Demonstrated skills in influencing and convincing senior stakeholders
Added 6 mins ago
G
Specialist, Automation
Glencore
Elkford, BC
- $95,000 to $112,000 CAD / year
- Full-time
Reporting to the Senior Engineering Supervisor, the Specialist, Automation, is responsible for safely delivering and maintaining a diverse set of technology that is redefining the way we…
Added 6 mins ago
PG
Senior Software Developer
PEER Group
Kitchener, ON
- $105,000 to $155,000 CAD / year
- Full-time
We are seeking a Senior Software Developer to join our Product Engineering Team and help create the next generation of high-performance, data-intensive applications used in semiconductor…
Added 7 mins ago
Full Stack Python and React Senior Developer
Capgemini
Montreal, QC
Added 7 mins ago
RB
Senior Director, Operations
Royal Bank of Canada
Toronto, ON
- Full-time
As the Senior Director, Operations in Canadian Wealth Management Operations, you will help drive strategy in a large diverse group of departments that supports multiple business lines…
Added 7 mins ago
RB
Director, New Accounts and Documentation
Royal Bank of Canada
Toronto, ON
- Full-time
…priorities with firm-wide initiatives. The incumbent acts as a senior liaison between Operations and business leadership, supporting internal and external customers across business lines…
Added 7 mins ago
RB
Director-Global Tax Operations
Royal Bank of Canada
Toronto, ON
- Full-time
The Director, Global Tax Operations is a senior position overseeing key teams in RBC Wealth Management Canada Operations. This role works in close partnership with RBC Wealth Management and…
Added 7 mins ago
Lead Software Developer
Geotab
Toronto, ON · Oakville, ON · Waterloo, ON
The Lead Software Developer is primarily responsible for designing, building and maintaining efficient, reusable, reliable code to develop high throughput, performance critical, scalable…
Added 20 mins ago
FC
Supervisor, Business Accounting
Federated Co-operatives Limited
Saskatoon, SK
- Full-time
Lead a team of Senior Accountants, Accounting Technicians and Accounting clerks responsible for providing full cycle accounting services to local co-ops retails; this includes participating…
Added 20 mins ago
NH
Senior Architectural Technologist
Noam Hazan Design Studio
Toronto, ON
- Full-time
Senior-level experience as an Architectural Technologist, Architect or comparable architectural professional.
Added 20 mins ago
CI
Manager, Distribution Centre and Logistics
Compugen Inc
Richmond Hill, ON
- Full-time
This is a mid-senior level Management role with up to 5 direct reports and a total team of greater than 50 operating nationally with multiple locations.
Added 20 mins ago
TP
Executive Assistant Office Manager
TDS Personnel
Toronto, ON
- $100,000 to $110,000 CAD / year
- Full-time
Prepare expense and health reimbursement forms for senior leadership, including gathering all necessary supporting documentation.
Added 20 mins ago
SH
Medical Director 0.3 EFT
Shared Health-Soins Communs
Winnipeg, MB · Greater Winnipeg Metropolitan Area
- Full-time
Attends regular meetings with senior mental health program leadership
Added 20 mins ago
I
Strategic Planning & Process Redesign Manager - 12‑month contract
Indigo
Toronto, ON
- $110,000 to $120,000 CAD / year
- Full-time
…planning calendar, preparing tools and materials, facilitating senior leadership discussions, and sustaining reporting on strategic initiatives and performance. The role also enables…
Added 20 mins ago
GC
Vice President Finance
GlassRatner Canada
Toronto, ON · Greater Toronto Area, Canada
- Full-time
…serving as a trusted advisor to the CEO, Board of Directors, and senior leadership…
Added 20 mins ago
CN
Director of Financial Strategy
Canada's National Ballet School
Toronto, ON
- Full-time
…the Director of Financial Strategy is a key member of NBS’ Senior Management team. This role provides strategic leadership in financial planning, analysis, enterprise intelligence, decision…
Added 20 mins ago
BT
Senior Manager, Small Business Services
Baker Tilly Canada
Winnipeg, MB
- Full-time
We are looking for a full-time, permanent Senior Manager to lead our small business practice in Winnipeg, Manitoba. This role suits an experienced small business practitioner who knows…
Added 20 mins ago
AS
VP, Finance
About Staffing
Calgary, AB
- $180,000 to $210,000 CAD / year
- Full-time
…communication and the ability to build effective relationships with senior leadership and cross-functional teams are highly…
Added 20 mins ago
NV
Senior Business Analyst (ID#5562)
New Value Solutions
St. John's, NL
- Contract
New Value Solutions (NVS) is seeking an experienced Senior Business Analyst (Level 2) to support business requirements validation, solution design, business process improvements, system…
Added 20 mins ago
NC
JR Municipal Technologist or SR Municipal Technologist (PFT)(CUPE 56.26) repost
Norfolk County
ON · Simcoe, ON
- Full-time

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.

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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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