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Lead the thermal development and verification of spacecraft subsystems from concept through flight qualification. This includes designing thermal control solutions, maintaining predictive models, and collaborating across multidisciplinary teams to ensure mission success.
Requires a Bachelor's degree in Mechanical, Aerospace, or Mechatronics Engineering with over 4 years of experience in thermal solutions for complex aerospace systems. Proficiency in thermal analysis platforms and CAD software is essential.
At Kepler Communications, we're not just imagining the future of on-demand space connectivity - we're leading it!
Our mission is to provide real-time Internet access for space-based assets, enabling a new era of data-driven exploration and innovation. With 33 satellites launched to date, Kepler operates the first commercial optical data relay constellation, enabling real-time, continuous space communications while supporting advanced on-orbit compute and hosted payload capabilities.
Industry-leading technology is only part of the story. What sets Kepler apart is our team: bold thinkers, skilled builders, and passionate problem-solvers who thrive on pushing the boundaries of what’s possible in space. We believe great ideas come from diverse perspectives, and we’re committed to creating an environment where you can grow, lead, and make a global impact.
If you’re ready to reach higher, move faster, and do work that shapes the future space economy - this is your launchpad. Come build the future with Kepler!
* Competitive compensation with a robust equity plan to share in our success.
* Comprehensive coverage for health, dental, and vision insurance—including dependents.
* Unlimited vacation, supportive parental leave policy, and company-wide holiday shutdown.
* Semi-annual company-wide parties and frequent in-office team events.
* Relocation packages available for approved roles.
* $1,500 annual professional development fund to support your growth.
* Fully stocked Toronto office kitchen with snacks, drinks, games and top-notch kitchen appliances.
* Town Halls, Celebration Calls, and Company-wide events to stay connected and engaged.
* We’re a certified Great Place to Work®, five years in a row!
Position Status: Contingent Upon Program Award
We are seeking a Thermal Designer to lead the thermal development and verification of spacecraft subsystems.
This role combines thermal architecture, thermal analysis, hardware development, testing, and cross-functional collaboration to ensure spacecraft systems operate reliably throughout all mission phases and environmental conditions. The successful candidate will own thermal performance from concept through qualification, working closely with systems, RF, electrical, software, mechanical, manufacturing, AIT, and mission operations teams to develop robust and scalable solutions.
The ideal candidate thrives in environments where thermal performance, mass, reliability, manufacturability, schedule, and cost must all be balanced to achieve mission success. They are equally comfortable developing thermal models, designing thermal control solutions, interpreting test data, and solving complex multidisciplinary challenges.
This role is an opportunity to directly influence the next generation of Kepler spacecraft while helping establish the engineering practices, technical rigor, and thermal engineering capability that will enable Kepler to become a world leader in spacecraft development and space infrastructure.
\nKey Responsibilities:Thermal Development & Ownership
Lead the thermal development of spacecraft subsystems from concept through flight qualification and successful transition into production
Own subsystem-level thermal development activities including thermal architecture, thermal modeling, thermal control design, verification, testing, and qualification
Design and evaluate thermal control solutions including conductive, radiative, and passive thermal management approaches
Define thermal requirements, operating limits, and thermal performance margins throughout the development lifecycle
Demonstrate compliance with thermal requirements through analysis, testing, and documented margins of safety
Analysis, Verification & Risk Reduction
Develop and maintain thermal models used to predict spacecraft and subsystem thermal performance
Define thermal verification strategies and success criteria aligned with mission requirements
Establish orbital thermal boundary conditions and environmental assumptions used in thermal analyses
Plan and execute thermal test campaigns to validate performance and reduce technical risk
Correlate simulation results with physical testing to continuously improve model fidelity and engineering confidence
Lead thermal investigations and drive complex technical issues through to resolution
Cross-Functional Collaboration
Work closely with systems, RF, electrical, software, mechanical, manufacturing, supply chain, AIT, and mission operations teams to develop integrated spacecraft solutions
Facilitate technical discussions regarding thermal performance, design trades, risks, and recommendations
Coordinate thermal activities across stakeholders to ensure successful integration, verification, and delivery
Engineering Excellence
Contribute to the continuous improvement of thermal engineering methods, modeling approaches, verification practices, and development workflows
Act as a peer reviewer, mentor junior engineers, and provide technical leadership within project teams
Promote a culture of technical rigor, accountability, collaboration, and continuous learning
Bachelor's degree in Mechanical Engineering, Aerospace Engineering, Mechatronics Engineering, or equivalent
4+ years of experience developing thermal solutions for complex mechanical, aerospace, or spacecraft systems
Strong understanding of heat transfer, thermo-optical radiation, thermal control systems, and spacecraft thermal environments
Experience developing and correlating thermal models using simulation and physical testing
Experience defining thermal requirements, operating limits, and verification approaches
Experience with one or more thermal analysis platforms such as Simcenter Space Systems Thermal, Thermal Desktop, or equivalent
Experience with CAD platforms such as Onshape, Creo, SolidWorks, NX, or equivalent
Understanding of design for manufacturing, assembly, integration, and test principles
Strong communication and documentation skills working within multidisciplinary engineering teams
Comfortable operating in a hands-on development environment involving prototyping, testing, troubleshooting, and hardware development
Experience developing spacecraft, satellite, aerospace, or other mission-critical hardware
Experience assessing and managing thermal interfaces between spacecraft platforms and customer payloads
Experience defining orbital thermal boundary conditions and spacecraft thermal architectures
Experience with thermal vacuum (TVAC), thermal balance, or environmental qualification testing
Familiarity with ESA ECSS, NASA, or equivalent aerospace thermal engineering standards
Experience supporting hardware transition from development into production
Eligibility for Professional Engineer (P.Eng.) licensure in a Canadian jurisdiction
Salary Range: $100,622 - 150,622 CAD
Actual total compensation will be determined at the Company’s discretion and is based on a variety of job-related factors, which may include, but are not limited to, relevant knowledge, skills, experience, performance, and education and/or training. The Company encourages all qualified applicants to apply, even if the posted salary range does not align with their expectations, as it does not reflect our total compensation package.
Job Type: Contingent Upon Program Award
Employment Equity & Accommodation Statement
Kepler Communications is an equal opportunity employer committed to building a diverse and inclusive workplace. We welcome applications from all qualified individuals, including women, Indigenous peoples, persons with disabilities, members of visible minorities, and people of all sexual orientations and gender identities.
If you require accommodation during any stage of the recruitment process, please contact our People & Culture team at [email protected], and we will work with you to meet your needs.
Building the Internet for Space
We are delivering on-orbit data at lightspeed with a constellation of satellites designed to act as Internet exchange points for space-to-space data relay. Headquartered in downtown Toronto, Kepler is vertically integrated with an in-house production facility, designing and deploying a hybrid optical constellation to modernize communications to missions in LEO and beyond.
Offices: 24 Ward St, Toronto, Ontario M6H 4A6, CA
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