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.

This engineer designs, fabricates, modifies and evaluates complex mechanical and electro-mechanical

components, sub-systems and systems. The person in this position may also provide work leadership for lower level employees.

Duties include, but are not limited to: 

• Lead the design and development of advanced refrigeration and HVAC systems for data centers.
• Provide technical leadership in the application of CO₂ transcritical systems for sustainable and efficient cooling.
• Perform thermal load calculations, equipment sizing, and system layout planning.
• Collaborate with electrical engineers, manufacturing engineers and field service engineers to ensure integrated and optimized cooling solutions.
• Conduct feasibility studies, energy modeling, and performance simulations.
• Oversee installation, commissioning, and troubleshooting of refrigeration systems.
• Ensure compliance with industry standards, safety regulations, and environmental guidelines.
• Prepare detailed technical documentation, specifications, and reports.

Requires a bachelor's degree in engineering. Requires at least 5 years related experience.

• Bachelor’s or Master’s degree in Mechanical Engineering, HVAC Engineering, or a related field.
• 7–9 years of experience in refrigeration or HVAC system design, with a focus on data center cooling.
• In-depth knowledge of data center thermal management, including CRAC/CRAH units, liquid cooling, and airflow management.
• Hands-on experience with CO₂ transcritical refrigeration systems and natural refrigerants.
• Strong understanding of thermodynamics, fluid mechanics, and heat transfer.
• Familiarity with relevant codes and standards (ASHRAE, ISO, IEC, etc.).
• Proficiency in design and simulation tools (e.g., AutoCAD, Revit, Pack Calculation Pro, Cycle_DX, VTB, or HVAC-specific software).
• Experience with energy efficiency optimization and sustainability initiatives.
• Knowledge of control systems and building automation for HVAC.
• Experience working in mission-critical environments or hyperscale data centers.