Senior Test Engineer – CDU Test and Qualification

About CoolIT Systems Inc.

Founded in Calgary, Alberta in 2001, CoolIT Systems is the leading Direct Liquid Cooling technology provider for data centers, supercomputers, and desktop computers. We design and manufacture solutions used by the largest tech companies globally.

Recognized as one of “The Americas’ Fastest Growing Companies 2023” by Financial Times and honored with the Deloitte Fast 50 Clean Technology award in 2022, as well as the Deloitte Fast 500 distinctions in both 2021 and 2022, CoolIT's rapid growth is capturing global attention.

As demand for generative AI, high performance computing and cloud solutions rapidly expands, there has never been a more exciting time to join our team.

WHAT YOU’LL DO:

Role

CoolIT Systems, Inc. is seeking a full-time Senior Test Engineer, who can lead, oversee and support the testing and qualification of Cooling Distribution Unit (CDU) systems, owning verification and validation strategies for mechanical, thermal, and fluid performance. Define test plans, support DFMEA and risk assessments, and oversee reliability and stress testing including HALT, thermal cycling, vibration, and pressure/flow evaluations. Lead instrumentation and data acquisition strategies, perform advanced statistical analysis, and translate results into actionable design improvements. Provide technical guidance and mentorship to test engineers and technicians, collaborate with design, manufacturing, and reliability teams, and communicate findings and recommendations to leadership and customers.

Reporting to Team Lead CDU (Test and Qualification), This role is ideal for a meticulous and technically skilled individual who thrives in a hands-on Mechanical and Electrical testing environment, is passionate about advancing liquid cooling technology.

Responsibilities

• Lead the development and ownership of test strategies, validation plans, and qualification roadmaps for mechanical, thermal, and fluid systems, ensuring alignment with internal engineering standards and customer requirements.
• Define and optimize test scope, configurations, acceptance criteria, and risk-based coverage for pumps, heat exchangers, PRVs, electrical systems, and fluid systems, with a focus on thermal performance, heat transfer efficiency, and system reliability.
• Translate complex system requirements into structured test plans, matrices, and execution frameworks, identifying gaps, constraints, and dependencies while ensuring robust coverage and compliance.
• Facilitate DFMEA-driven design reviews, identify high-risk areas, recommend mitigation strategies, and enforce design-for-test (DFT) and design-for-reliability (DFR) principles.
• Evaluate materials, tolerances, sealing concepts, and thermal/fluid performance, performing heat transfer analysis, thermodynamic assessments, and energy efficiency optimization.
• Plan, oversee, and execute reliability and stress tests, including HALT, thermal cycling, vibration, pressure/flow, mechanical load, leak testing, and thermal endurance evaluation, ensuring systems perform under real-world operating conditions.
• Lead test setup validation, instrumentation strategy, and data acquisition planning, ensuring precise measurement of temperature, pressure, flow, and other critical parameters.
• Develop and apply advanced statistical and data analysis frameworks (regression, variance, trend, Weibull) to assess performance, reliability, and thermal behavior, converting raw data into actionable engineering insights.
• Drive root cause analysis (RCA), implement corrective actions (CAPA), and guide continuous improvement initiatives across cross-functional teams.
• Create Non-Conformance (NC) reports and review Engineering Change Notices (ECNs), evaluating validation impact, risks, and test requirements for thermal, fluid, and mechanical systems.
• Provide feedback and guidance in Product Requirements Documents (PRD), System Requirements Documents (SRD), and design reviews, ensuring testability, thermal performance, and reliability considerations are incorporated early in design.
• Mentor and guide test engineers and test technicians, providing technical direction, best practices, and support for test execution, data analysis, and problem resolution.
• Collaborate cross-functionally with design, manufacturing, reliability, and suppliers to resolve technical issues, optimize system performance, and enhance thermal efficiency and fluid system behavior.
• Prepare and present data-driven technical reports, dashboards, and qualification summaries, communicating findings, risks, and recommendations to leadership, stakeholders, and customers.
• Participate in technical reviews, design gates, and project milestones, providing analytical feedback, mentorship, and guidance on thermal, fluid, and mechanical testing best practices.
• Provide technical leadership on heat exchanger sizing, fluid dynamics optimization, and thermal system improvements, supporting system-level design and qualification decisions.

Who You Are

Basic Qualifications:

• MSc in Mechanical Electrical, Electronics or relevant field.
• Strong knowledge of materials science, thermodynamics, fluid systems, and electro-mechanical components.
• Expertise in analyzing and optimizing heat transfer in mechanical systems
• Proficient in testing fluid flow and thermal behavior to support CDU Qualification and performance evaluation
• Demonstrated knowledge and experience in statistics and data science or data analysis.
• Hands-on experience with instrumentation (pressure, temperature, flow sensors), DAQs, and actuators.
• Proficiency with bench test tools (oscilloscope, power analyzer, logic analyzer, multimeter, etc.).
• Experience with embedded systems (PLCs, Raspberry Pi, microcontrollers) is an asset.
• Demonstrated ability to perform design reviews, risk assessments, and root cause analysis.
• Familiarity with control algorithms and PID tuning.
• Programming experience (Python and/or C/C++).
• Experience in mechanical hardware design in SolidWorks or equivalent CAD programs is an asset.

Preferred Qualifications

• Experience with data center liquid cooling systems.

• Familiarity with Liquid cooling infrastructure.

• Background in Mechanical and Electrical engineering.

Skills

• Ability to manage multiple test programs, priorities, and timelines effectively.

• Strong leadership and mentoring skills with the ability to guide and develop engineers and technicians.

• Excellent problem-solving and analytical skills, especially for failure analysis and root cause investigations.Clear and professional communication skills for presenting technical content to diverse stakeholders.

WHY COOLIT?

We strive to be an employer of choice and as such we believe in rewarding our employees with career and development opportunities that will maintain and strengthen our culture while aligning to our vision and values.

Benefits

We are a company that is full of vibrant, innovative people who love what we do. Our comprehensive benefits package includes:

• Vacation and flex days, and paid company-wide shutdown during the holiday season.
• Comprehensive benefits including Dental, Drugs, Optical, Paramedical and Health Spending. These costs are covered by CoolIT and are enacted from your first day.
• Dress for your day – in a casual yet professional environment.
• Retention rewards like “The Big Coffee Break” that reward tenure with additional vacation time and a monetary bonus.
• Employee ownership program.
• Company-funded RRSP contributions to support your long-term financial goals.

We thank every candidate in advance, however, only those selected for an interview will be contacted.

Successful candidates for this position will be required to undergo background checks including criminal records check and education.