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18 jobs

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Added 22 days ago
Senior Systems Integration Engineer
ADGA Group
Ottawa, ON
$135,000 to $150,000 CAD / year
Full-time
ADGA Group is a proudly Canadian-owned and operated defence and security technology company specializing in purpose-built solutions for government and industry. We deliver mission-critical…
Added 22 days ago
Senior Systems Integration Engineer
ADGA Group Consultants Inc
Ottawa, ON
$135,000 to $150,000 CAD / year
Full-time
ADGA Group is a proudly Canadian-owned and operated defence and security technology company specializing in purpose-built solutions for government and industry. We deliver mission-critical…
Added 5 days ago
Intermediate Software Engineer
Leonardo DRS
Ottawa, ON · Kanata, ON
Full-time
DRS Technologies Canada Ltd., a subsidiary of Leonardo DRS, is a leading mid-tier Canadian defence electronics company specializing in military voice and data communications systems;…
Added 13 days ago
Intermediate Electrical Engineer
AtkinsRéalis
Halifax, NS
Full-time
AtkinsRéalis is growing and our Atlantic Canada Engineering group is seeking an Intermediate Electrical Engineer to join our growing Electrical Engineering team. Reporting to the Senior…
Added 18 days ago
Intermediate ISTAR Software Developer
General Dynamics Mission Systems–Canada
Ottawa, ON
$75,000 to $85,000 CAD / year
Full-time
At General Dynamics Mission Systems–Canada, we’re not just engineering technology - we’re shaping the future of defence and security. Our teams design and deliver advanced, mission-critical…
Added 3 months ago
Sr. Software Developer - Hybrid/Secret Cleared
The Source Staffing
ON · Ottawa West, Ontario
Full-time
defence technology organization in hiring an Intermediate Software Developer
Added 3 months ago
Sr. Software Developer - Hybrid/Secret Cleared
The Source Staffing
Ottawa, Ontario
Full-time
defence technology organization in hiring an Intermediate Software Developer
Added 1 day ago
Senior Project Manager
National Research Council Canada / Conseil national de recherches Canada
Ottawa, ON
Full-time
…and adoption of emerging drone, counter-drone and autonomous systems technologies. At the centre of this effort is the Drone Innovation Hub (DIH) and its Aurora Shield program - bringing…
Added 5 days ago
Solutions Architect
Calian in Space & Technology
Ottawa, ON
Full-time
…small consulting firm into a trusted global company across defence, space, health, nuclear energy, public safety, and…
Added 18 days ago
Intermediate ISTAR Software Developer
General Dynamics Missions System International
Ottawa, ON
$75,000 to $85,000 CAD / year
Full-time
At General Dynamics Mission Systems–Canada, we’re not just engineering technology - we’re shaping the future of defence and security. Our teams design and deliver advanced, mission-critical…
Added 1 month ago
Junior Mechanical Engineer
Thales
Victoria, BC · Halifax, NS
Full-time
Working as part of a multidisciplinary Engineering Change Team, the successful candidate will support intermediate and senior engineers in the assessment, design, implementation, and…
Added 2 months ago
Senior Civil Engineer, Facilities
Irving Shipbuilding
Halifax, Nova Scotia
Full-time
…responsibility. They also provide mentorship to junior and intermediate technical staff. Responsibilities include the planning, design, construction, rehabilitation, and lifecycle…
Added 2 months ago
Senior Civil Engineer, Facilities
J.D. Irving, Limited
Halifax, NS
Full-time
…responsibility. They also provide mentorship to junior and intermediate technical staff. Responsibilities include the planning, design, construction, rehabilitation, and lifecycle…
Added 5 days ago
Intermediate Fire Protection Specialist
AtkinsRéalis
Toronto, ON · North York, ON
Full-time
AtkinsRéalis is expanding its national Fire Protection team and is looking for an Intermediate Fire Protection Specialist to support a growing portfolio of projects across Canada. Our team…
Added 5 days ago
Intermediate Fire Protection Specialist
AtkinsRéalis
Toronto, ON · North York, ON
Full-time
AtkinsRéalis is expanding its national Fire Protection team and is looking for an Intermediate Fire Protection Specialist to support a growing portfolio of projects across Canada. Our team…
Added 17 days ago
Intermediate Code Consultant
AtkinsRéalis
Toronto, ON · North York, ON
Full-time
In this role, you will support regulated and technically challenging projects in sectors such as nuclear, defence, rail, industrial, and other high-reliability environments. Working…
Added 17 days ago
Intermediate Code Consultant
AtkinsRéalis
Toronto, ON · North York, ON
Full-time
In this role, you will support regulated and technically challenging projects in sectors such as nuclear, defence, rail, industrial, and other high-reliability environments. Working…
Added 18 days ago
Intermediate Code Consultant
AtkinsRéalis
Calgary, AB · Edmonton, AB · Vancouver, BC · Winnipeg, MB · Halifax, NS · Ottawa, ON · Toronto, ON · Regina, SK · Saskatoon, SK
Full-time
In this role, you will support regulated and technically challenging projects in sectors such as nuclear, defence, rail, industrial, and other high-reliability environments. Working…

No more jobs.

The Source Staffing

Sr. Software Developer - Hybrid/Secret Cleared

ON, Canada
Ottawa West, ON, Canada

Job type: Full-time
Experience: Minimum 10 years of software development experience
Posting language: English
Posted: Jun 17, 2026

Apply About employer

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Original job description

Senior Software Developer - Hybrid/Secret Cleared 90-110k

About the Opportunity

The Source Staffing is supporting a leading Canadian defence technology organization in hiring an Intermediate Software Developer / Engineer to join a mission-critical program supporting the Department of National Defence (DND).

This role is ideal for Secret cleared developers in the Ottawa region who are looking to apply their skills to operationally relevant systems used by the Canadian Armed Forces, specifically LC4ISR. You’ll be contributing directly to tactical command-and-control capabilities in a highly collaborative, agile delivery environment.

Why This Role Stands Out

Work on active DND programs with real operational impact
Join an internal team deeply embedded in Canada’s defence and security ecosystem
Stable, long-term program work (not short-term project churn)
Collaborate with company colleagues; experienced engineers, CAF stakeholders, and system integrators

The Role

You will contribute to the design, development, and integration of tactical software applications, ensuring they meet the performance, reliability, and security requirements expected in defence environments.

This is a hands-on development role with exposure to system-level thinking, integration challenges, and real-world deployment considerations. Please note that while the need to apply is urgent, and initial confirmation may come within a week, the actual start date may likely be 3-5 weeks.

Key Responsibilities

Design, develop, and enhance software systems within an LC4ISR framework
Support system integration, verification, and validation activities
Analyze and resolve system-level issues, including performance and interoperability challenges
Collaborate with internal teams and external stakeholders to ensure system reliability and maintainability
Conduct technical investigations into third-party software and integrations
Review and contribute to technical documentation (interfaces, components, specifications)
Support integration testing and evaluation activities in controlled environments
Contribute within a SAFe Agile delivery model

Requirements

Required Qualifications

Must-Have

Active SECRET security clearance (mandatory – must be valid and transferable)
Minimum 10 years of software development experience
Proficiency in Java and or C#
Experience working in secure or regulated environments (defence, public sector, or similar)
Solid understanding of software architecture, integration, and debugging

Assets

Exposure to NATO standards or STANAG 4586

Previous work on command-and-control (C2) systems or defence-related platforms

Education

Degree in Computer Science, Engineering, IT, Science or related field
Equivalent hands-on experience in defence or secure environments will be considered

Core Competencies

Strong problem-solving and analytical thinking
Ability to work effectively in cleared, multi-stakeholder environments
Clear and professional communication skills
Experience with automation, monitoring, and secure development practices

Work Environment

Based in Kanata, ON, Hybrid, 4 days on-site (flexible)
Collaboration with internal colleagues, government, military, and contractor teams
Casual

How to Apply

If you are a SECRET-cleared software developer in the Ottawa area looking for meaningful, long-term work in the defence space, we encourage you to apply for this or for future consideration

Submit your resume to The Source Staffing at jobs@thesourcestaffing. com

Benefits

Full Benefits; 4 weeks' Vacation

Apply About employer

More about this job

Responsibilities

You will design, develop, and integrate tactical software applications within an LC4ISR framework to meet defence performance and security requirements. Additionally, you will support system integration, verification, and validation activities while collaborating with internal teams and external stakeholders.

Requirements

Candidates must possess an active SECRET security clearance and at least 10 years of software development experience. Proficiency in Java or C# and experience working in secure or regulated environments are mandatory requirements.

Skills

Java
C#
Software Architecture
System Integration
Debugging
Agile
SAFe
Command-and-control systems
LC4ISR
Security clearance
Technical documentation
Verification and validation
Performance analysis
Interoperability
Automation
Monitoring

Benefits

Full Benefits
4 Weeks' Vacation

Visa sponsorship

Not detected in the job text

Keywords

Software Developer
Defence
Secret Cleared
Java
C#
LC4ISR
DND
Canadian Armed Forces
Agile
SAFe
System Integration
Command-and-control
C2
NATO standards
STANAG 4586
Security Clearance
Software Architecture
Debugging
Kanata
Government
Military
Tactical software
Verification
Validation
Interoperability
Automation
Monitoring
Secure development
Technical documentation
Engineering

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