Lennox (NYSE: LII) Driven by 130 years of legacy, HVAC and refrigeration success, Lennox provides our residential and commercial customers with industry-leading climate-control solutions. At Lennox, we win as a team, aiming for excellence and delivering innovative, sustainable products and services. Our culture guides us and creates a workplace where all employees feel heard and welcomed. Lennox is a global community that values each team member’s contributions and offers a supportive environment for career development. Come, stay, and grow with us.

WHAT YOU WILL BE DOING:

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Lennox is seeking a highly skilled and experienced Software Systems Validation Engineer to join our team in Carrollton, TX. This role focuses on the validation of embedded controllers that power innovative HVAC solutions for commercial applications.

As a key member of the validation team, the selected candidate will be responsible for ensuring the quality, reliability, and robustness of embedded HVAC controller systems. The role involves validating complex system interactions across hardware, firmware, and communication layers. It requires a proactive, hands-on engineer with the ability to thrive in fast-paced environments, adapt to dynamic project requirements, and deliver results under constrained timelines.

DUTIES INCLUDE BUT ARE NOT LIMITED TO:

• Design and develop comprehensive validation strategies tailored for embedded controllers in the HVAC domain.
• Create and maintain test deliverables, including:
• Test plans aligned with project requirements and functional specifications.
• Test content such as manual and automated test cases for validating system functionality, performance, and reliability.
• Test execution schedules, ensuring all test activities are performed on time.
• Bug reports with detailed root cause analysis and actionable feedback for development teams.
• Test reports summarizing results, coverage, and overall system quality.
• Execute validation activities across all stages of the Software Testing Life Cycle (STLC), ensuring system compliance with functional, performance, and reliability requirements.
• Collaborate with cross-functional teams, including software developers, system architects, hardware engineers, and product managers, to define test requirements, align on deliverables, and resolve issues.
• Develop and maintain automated test solutions to enhance coverage, efficiency, and repeatability of validation processes.
• Debug and troubleshoot complex interactions between hardware and software, utilizing tools like oscilloscopes, logic analyzers, and protocol analyzers.
• Contribute to continuous improvement efforts in validation methodologies, tools, and processes to elevate quality standards.
• Ensure alignment with project schedules, consistently meeting deadlines with minimal supervision while maintaining high-quality standards.

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WHAT WE ARE LOOKING FOR:

Required:

• Bachelor’s or Master’s degree in Electronics Engineering, Computer Science, or a related field.
• Minimum 5 years of professional experience in system-level validation, ideally in embedded systems.
• Strong understanding of embedded systems, including microcontrollers, real-time operating systems (RTOS), and firmware development.
• Proficiency in debugging and troubleshooting hardware/software interfaces.
• Expertise in validation tools, automation frameworks, and scripting languages (Python preferred).
• Familiarity with communication protocols such as UART, I2C, SPI, CAN, BLE.

Preferred:

• Familiarity with programming languages such as C, C++, C#, and scripting languages like Python, bash, Rust.
• Experience validating systems in industries such as HVAC, automotive, aerospace, medical, industrial controls, or related fields.
• Hands-on experience with test management tools, Azure DevOps preferred.
• Expertise with Version control tools, preferably Git, and knowledge of CI/CD pipelines for continuous integration and deployment is a plus.

Soft Skills and Working Style:

• Capable of working independently with minimal supervision, taking initiative to identify and address challenges.
• Thrives in fast-paced environments with tight deadlines and evolving project priorities.
• Flexible and adaptable to last-minute changes in project scope or timelines.
• Strong problem-solving skills with a methodical approach to debugging and root cause analysis.
• Excellent communication and collaboration skills, able to convey complex technical concepts to diverse audiences.
• Passionate about innovation and continuous improvement, contributing creative ideas to improve validation processes.

WHAT WE OFFER:

At Lennox, our greatest assets are our employees, and we are committed to providing limitless opportunities for growth and development of all, largely promoting from within the organization. This position is ideal for anyone looking for a diverse working environment with long term growth possibilities. This role is on-site. In the office Monday - Friday. 

BENEFITS:

• Competitive base salary
• Excellent medical plans designed to support healthy lifestyles
• Mental and financial health programs
• Outstanding 401k with company matching
• Employee stock purchase program
• Community involvement opportunities
• Robust employee assistance program
• And much, much more!

OUR CULTURE:

At Lennox, our Core Values of Integrity, Respect & Excellence are ingrained in the fabric of the organization. They define our culture – which is about how we do business and how we treat others. Lennox is not just a workplace; we are a global community that values each team member’s contributions. As an equal opportunity employer, we are committed to recruit, develop, and retain talented individuals from a wide range of backgrounds, ensuring that everyone has the opportunity to succeed and contribute to our continued growth and success. At Lennox, you’ll take pride in our brands, knowing you are part of something special. Come, stay, and grow with us!