Linux Government Jobs in Ontario (NOW HIRING)

ADGA Group is a Canadian-owned defence and security company that provides integrated, mission-critical technical solutions to Government and industry, specializing in C5ISRT, simulation and training, cyber and infrastructure security, and program delivery. With nearly 60 years of experience, ADGA supports federal clients and Canada’s intelligence and enforcement agencies through embedded teams, advisory services, and full project execution, applying deep operational expertise and innovation to strengthen national safety, resilience, and sovereignty. Guided by a strong social mandate, the company creates meaningful employment for veterans of the CAF and RCMP and other professionals committed to public service, while fostering a safe, inclusive, and agile workplace that supports career development, professional growth, and impactful work across Canada.

We are seeking a Technical Architect with deep expertise in Linux systems, cloud platforms, and enterprise application environments to support Command-and-Control (C2) systems operating across both classified and cloud-based networks. This role will be responsible for system architecture, platform modernization, and operational sustainment of complex environments built on Liferay, Oracle/PostgreSQL, and Linux distributions. The successful candidate will play a key role in system migrations, performance optimization, and ensuring high availability in secure and mission-critical environments. 

This is a proactive recruitment initiative, with potential start dates in the coming weeks or months, contingent on contract award.

Key Responsibilities 

• Architecture & System Design 
  • Develop and maintain end-to-end system architecture documentation for CV/UCV/MDTS environments  
  • Define architecture across components including databases, application frameworks, middleware, and infrastructure  
  • Produce and maintain technical diagrams, system documentation, and Concept of Support artifacts  
• System Administration & Operations 
  • Install, configure, optimize, and administer Linux-based systems (RHEL, Alma Linux, Ubuntu, AIX, UNIX)  
  • Maintain system operations through daily verification, monitoring, and scheduled maintenance  
  • Troubleshoot and resolve complex system and performance issues  
• Migration & Modernization 
  • Plan and execute system migrations, including:  
  • CV systems to updated Liferay, RHEL/Alma Linux, and PostgreSQL in classified environments  
  • UCV systems to updated platforms in Azure or AWS cloud environments  
  • Ensure minimal disruption and secure transition during upgrades and migrations  
• Automation & Scripting 
  • Develop and maintain Bash, PowerShell, and Python scripts to automate administrative and operational tasks  
  • Improve operational efficiency through scripting and automation  
• Database & Middleware Management 
  • Support and optimize Oracle and PostgreSQL databases  
  • Administer and support Liferay (Portal/DXP), Apache HTTPD, and Tomcat environments  
• Performance, Backup & Recovery 
  • Analyze system performance and implement corrective and optimization measures  
  • Design and implement backup strategies and disaster recovery procedures (DRP)  
  • Ensure system resilience and continuity in high-availability environments  
• Governance & Knowledge Transfer 
  • Support ITSM processes, including Request for Change (RFC) documentation and approvals  
  • Provide knowledge transfer and technical guidance to internal teams  
  • Develop and maintain Standard Operating Procedures (SOPs)  

Technical Environment 

• Operating Systems: UNIX, AIX, RHEL, Alma Linux, Ubuntu  
• Cloud & Identity: Azure, AWS, Entra ID  
• Scripting: Bash, PowerShell, Python  
• Databases: Oracle, PostgreSQL  
• Middleware / Applications: Liferay (Portal, DXP), Apache HTTPD, Tomcat  
• Other: Node.js (supporting components), ITSM tools and processes

• 5+ years experience as a Technical Architect  
• College diploma or University degree in Computer Science, Engineering, IT, or related field  
• Minimum 5 years of Linux administration experience within the last 10 years  
• Experience designing and supporting complex, multi-environment systems  
• Strong experience with:  
  • Linux server installation, configuration, and maintenance  
  • System troubleshooting and performance optimization  
  • Technical documentation and architecture design  
• 5–10+ years experience administering enterprise Linux environments (RHEL, Alma, Ubuntu)  
• Experience with cloud platforms (Azure and/or AWS)  
• Experience with Bash / PowerShell scripting for automation  
• Experience supporting Oracle and PostgreSQL databases  
• Familiarity with ITSM change management (RFC processes)  
• Experience working in secure, government, or defence environments 

• Must currently hold or be eligible to obtain and maintain a Secret (Level II) Canadian Federal Government Security clearance.

If you require accommodations during any stage of the application or interview process, please let us know. We are happy to work with you to meet your needs.

*Our recruitment systems include artificial intelligence–enabled tools; however, AI is not used to screen, evaluate, or make decisions about applicants for this role.

*Unless otherwise stated, all job postings reflect a current vacancy at the time of publication.

Work-Life Balance  

We strongly support a healthy and productive work-life balance. This starts with a flexible approach to work, and policies designed to support employees through their day-to-day routines and major life events. For example, we offer a Maternity/Parental Top-Up (up to 52 weeks) and a Reservist Leave Top-Up (up to 180 days). 

Belong@ADGA  

ADGA continuously strives to integrate advanced Diversity, Equity & Inclusion (DEI) approaches and practices into our work culture. Our employee-based DEI Committee explores activities and invites discussions that foster an environment where all employees feel valued, respected, and heard.

Compensation  

Above and beyond our commitment to offer a competitive base salary, ADGA has a company-wide profit-sharing plan for all full-time and part-time employees.

Comprehensive Benefits and Total Rewards  

We offer a comprehensive benefit program, providing employees with the choice between base or enhanced plans. Depending on the plan, ADGA pays for Health & Dental, a Health Spending Account, Short-Term Disability, an Employee Assistance Program, and a Telemedicine service. Also offered: discounts on gym memberships, 5,000+ perks through Perkoplis, a Deferred Profit Sharing Plan, and access to a wide range of other employee-centric services and savings programs.