Ingénieur(e) en conception de logiciels de systèmes de commande / Control Systems Software Design Engineer

RTX Corporation; Mississauga; On-site; CAD 110,000 - 150,000; Full time

Benefits offered by this job

Pension and savings plan with employer

Group insurance program

Opportunities for advancement

Merit or recognition program

Health and wellness program

Job summary

Pratt & Whitney Canada in Mississauga, Ontario or Longueuil, Quebec, seeks a Control Systems Software Design Engineer to develop safety‑critical engine control software across the DO‑178 lifecycle. You will design software architecture using model‑based design, Ada, C/C++, and collaborate with global teams to meet industry standards and certification requirements.

The role is on-site, requires 5+ years in controls or avionics, and English proficiency; knowledge of DO‑178 and powerplant

Qualifications

• Bachelor’s degree in engineering or computer science.
• At least 5 years of experience in controls, embedded safety‑critical systems, avionics, or gas turbine environments.
• Knowledge of powerplant systems, sensors, actuators, and aircraft interfaces.
• Experience with DO‑178 or similar standards.
• Excellent written and verbal communication skills.

Responsibilities

• Develop aircraft engine control system software architecture, requirements, and code using model‑based design, Ada, C/C++, and other programming languages.
• Perform in‑depth reviews, analysis, and testing of software systems in collaboration with our global engineering team.
• Create and review certification artifacts, support SOI audits, and ensure our software meets the highest industry standards and complies with DO‑178.
• Support software testing activities in simulations, test benches, test cells, and flight tests.
• Be a change agent by driving process improvements and helping push the boundaries of automation.

Job description

Job Title: Control Systems Software Design Engineer

Pratt & Whitney Canada (P&W) is a global leader in aerospace innovation, proudly headquartered in Longueuil, Quebec, since 1928. We design and manufacture next‑generation aircraft engines that power the world’s largest fleet of business, general aviation, and regional aircraft and helicopters. For nearly 100 years, our teams have been at the forefront of propulsion technology, pushing boundaries to make flight more efficient and reliable. Our engines support missions that truly matter, from transporting people and essential goods, to enabling emergency medical services, humanitarian operations, and wildfire suppression around the world.

Pratt & Whitney Canada was named one of Canada’s Best Employers for 2026 by Forbes, marking the 11th consecutive year the company has earned this recognition. Pratt & Whitney Canada also ranked #1 employer in the aerospace and defense industry in the country. In addition, our headquarters continues to be recognized among the top employers in the Montreal region. Together, these distinctions reinforce our reputation as an employer of choice in Montreal, across Canada, and around the world.

Why join our team?

Are you ready to design software that powers the future of flight? Join us as a Control Systems Software Design Engineer and be part of a team developing cutting‑edge, safety‑critical control system software for aircraft engines. In this role, you’ll work across the DO‑178 lifecycle, from requirements capture and design through verification and certification. You’ll collaborate with our engineering teams, suppliers, customers, and test organizations to develop and support both new and in‑service products. If you’re driven by innovation, collaboration, and the thrill of seeing your work take to the skies, this is the role for you!

Location and Working Hours

The position is based at either our Mississauga, Ontario, or Longueuil, Quebec, locations. This position is fully on‑site, Monday through Friday.

What will your day‑to‑day look like?

Develop aircraft engine control system software architecture, requirements, and code using model‑based design, Assembly, Ada, C/C++, and other programming languages. Perform in‑depth reviews, analysis, and testing of software systems in collaboration with our global engineering team. Create and review certification artifacts, support SOI audits, and ensure our software meets the highest industry standards and complies with DO‑178. Support software testing activities in simulations, test benches, test cells, and flight tests. Be a change agent by driving process improvements and helping us push the boundaries of automation.

What do you need to be successful?

Bachelor’s degree in engineering or computer science. At least 5 years of experience in controls, embedded safety‑critical systems, avionics, or gas turbine environments. Knowledge of powerplant systems, sensors, actuators, and aircraft interfaces. Experience with DO‑178 or similar standards. Excellent written and verbal communication skills. A collaborative spirit that thrives in a team‑oriented environment. A proactive and adaptable mindset, with the ability to take on challenges and find creative solutions. Strong organizational and time‑management skills. A passion for continuous learning and growth within the aerospace and defense industry. This position is part of a French‑speaking work environment; it requires a very good knowledge of English to read and understand, on a daily basis, documentation and technical terms that may emanate from international organizations, as well as to write and communicate in English with customers, suppliers or international colleagues.

Conditions and Compliance

The selected candidate will be required to complete a criminal background check and any applicable clearances with respect to the handling and transfer of controlled goods. Employment is conditional upon the successful completion of these checks and obtaining the required clearances. Failure to do so will result in the withdrawal of the employment offer.

Benefits and Perks

• Pension and savings plan with employer contributions
• Group insurance program
• Opportunities for advancement (career progression)
• Merit or recognition program
• Health and wellness program, including virtual health care
• Recreational and sports club
• Nearby daycares
• Transportation accessibility or public transit program and free parking

Equal Employment Opportunity

RTX adheres to the principles of equal employment. All qualified applications will be given careful consideration without regard to ethnicity, color, religion, gender, sexual orientation or identity, national origin, age, disability, protected veteran status or any other characteristic protected by law.

RTX adhère aux principes d’égalité en matière de recrutement et d’embauche. Toutes les candidatures de postulants qualifiés seront examinées avec attention, sans distinction d’origine ethnique, de couleur, de religion, de genre, d’orientation sexuelle ou d’identité sexuelle, d’origine nationale, d’âge, de handicap, de statut d’ancien combattant protégé ou de toute autre caractéristique protégée par la loi.

We will consider applications from all qualified candidates.

At Pratt & Whitney Canada, we combine passion, boldness, and precision to design, manufacture, and maintain the most advanced and reliable aircraft engines in the world. Our work and the quality of our products contribute to the success of our customers, who in turn save lives, support commerce, connect communities, and protect freedoms. At Pratt & Whitney Canada, you have the opportunity to make a difference every day—just look up. Are you ready to go beyond?