Top Benefits
About the role
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.
Required
Technical Skills
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.
Not the right fit? Search for Engineer System administrator jobs in Toronto, Ontario, Canada
About CBTS
CBTS (#43 CRN Solution Provider 500) serves enterprise and midmarket clients in all industries across North America. We combine deep technical expertise with a full suite of flexible technology solutions—including Application Modernization, Managed Hybrid Cloud, Cybersecurity, Digital Workplace, and Infrastructure solutions. From developing and deploying modern AI-enabled applications and the secure, scalable infrastructure platforms on which they run, to managing, monitoring, and optimizing their operations, we are your trusted partner.
CBTS stays at the forefront of technology trends in order to offer best-of-breed solutions to our clients. We partner with all leading technology manufacturers across the broad IT landscape and offer customized solutions to achieve our clients’ measurable business outcomes. Clients leverage our flexible OpEx or CapEx delivery model to:
- Enable collaboration, workforce mobility, and omni-channel customer experience.
- Modernize e-Commerce platforms, web presence, and applications to digitally transform their businesses.
- Improve data protection and security strategies that address ongoing cyber threats and meet industry compliance requirements.
- Implement cloud strategies that improve business agility, speed to market, and reduce costs.
- Manage technology infrastructure and maintain 24x7x365 operational uptime.
Similar Jobs
Top Benefits
About the role
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.
Required
Technical Skills
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.
Not the right fit? Search for Engineer System administrator jobs in Toronto, Ontario, Canada
About CBTS
CBTS (#43 CRN Solution Provider 500) serves enterprise and midmarket clients in all industries across North America. We combine deep technical expertise with a full suite of flexible technology solutions—including Application Modernization, Managed Hybrid Cloud, Cybersecurity, Digital Workplace, and Infrastructure solutions. From developing and deploying modern AI-enabled applications and the secure, scalable infrastructure platforms on which they run, to managing, monitoring, and optimizing their operations, we are your trusted partner.
CBTS stays at the forefront of technology trends in order to offer best-of-breed solutions to our clients. We partner with all leading technology manufacturers across the broad IT landscape and offer customized solutions to achieve our clients’ measurable business outcomes. Clients leverage our flexible OpEx or CapEx delivery model to:
- Enable collaboration, workforce mobility, and omni-channel customer experience.
- Modernize e-Commerce platforms, web presence, and applications to digitally transform their businesses.
- Improve data protection and security strategies that address ongoing cyber threats and meet industry compliance requirements.
- Implement cloud strategies that improve business agility, speed to market, and reduce costs.
- Manage technology infrastructure and maintain 24x7x365 operational uptime.