Senior Technical Architect - Linux Systems & Cloud

ADGA Group Consultants Inc•Ottawa, ON

23d•CA$130 - CA$150

About The Position

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.

Requirements

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
Strong experience with system troubleshooting and performance optimization
Strong experience with 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.

Nice To Haves

AI is not used to screen, evaluate, or make decisions about applicants for this role.

Responsibilities

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
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
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
Develop and maintain Bash, PowerShell, and Python scripts to automate administrative and operational tasks
Improve operational efficiency through scripting and automation
Support and optimize Oracle and PostgreSQL databases
Administer and support Liferay (Portal/DXP), Apache HTTPD, and Tomcat environments
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
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)