Lennox Mechanical Engineer III in Carrollton, Texas

Company Overview

Lennox International (LII) is a leading global provider of innovative climate control solutions for heating, ventilation, air conditioning, and refrigeration (HVACR) markets.

Beginning over a century ago, Lennox International has built a strong heritage of Innovation and Responsibility. Our position as an innovation leader continually inspires us to promote more efficient energy use and a healthier environment through our product operations. Our engaged and diverse workforce is committed to providing climate control solutions that provide the most value and comfort for our customers.

We are proud to have instilled a shared sense of responsibility and commitment among our approximately 10,000 employees located throughout North America, South America, Europe, Asia, and Australia.

Job Description

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.


  1. Propose technology concepts that lead to higher efficiencies, improved reliability and comfort

  2. Use concept selection methods to shortlist technologies for the technology development pipeline

  3. Develop the shortlisted technology concepts for application in the residential, commercial and refrigeration segments through analysis, simulation and experimentation

  4. Mature technologies to readiness for transfer into the New Product Development Cycle for Lennox

  5. Develop algorithms using data from fielded and lab systems which enhance efficiency, reliability and/or comfort



  1. S. or Ph. D in mechanical engineering or related discipline with a focus on heat transfer and fluids

  2. Demonstrated experience in development of cutting edge HVAC systems including analysis, system design and performance validation

  3. Detailed understanding of Two Phase Flow Heat transfer and pressure drop

  4. Working knowledge of data analysis tools such as MSSQL, MATLAB, Tableau, Cliq and MS Excel

  5. Working knowledge of programming languages such as C and Python is preferred

  6. Working knowledge of CFD and/or FEA tools is preferred

  7. Understanding of HVAC systems is preferred

Requisition # 2018-15409

Category Engineering

Shift / Hours Regular

Lennox International is an Equal Opportunity Employer and supports a diverse, inclusive work environment.

All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, transgender status, sexual orientation, national origin, genetics, disability, age, or veteran status.

Applicants with Disabilities

If you are an individual with a disability or a disabled veteran who is unable to use our online tools to search and apply for jobs, you may request a reasonable accommodation by contacting us at Recruitment@Lennoxintl.com

E-Verify Participation

For jobs located within the United States, LII participates in the Electronic Employment Verification Program known as E-Verify.

Please visit the E-Verify website for more information on this program.