Thermal Engineer

The Thermal Engineering role at Lunar Energy is a key position within a company where thermal system performance is core to company success. Lunar is looking for an engineer with broad experience in thermal system modeling, testing, and design. Experience rapidly developing and ramping innovative products with complex thermal behavior to high volume production. An engineer with outstanding organization and communication skills, the ability to drive schedules and solve technical challenges quickly. If (when) there is a problem, to be hands-on in the lab or on the line, or assisting cross functional teams to solve the issues. 

Lunar Energy was founded to transition homes to 100% clean energy—making our electricity greener, our air cleaner, and our energy more safe, secure and reliable for all. We're a fast-growing, well funded, global company building the world's best clean energy products to electrify all homes and connect communities to form clean, resilient virtual power plants. Lunar offers both a hardware and software solution approaching home energy storage from both the consumer’s and utilities perspective to provide the most reliable and advantageous energy storage products.

On a given day at Lunar, you’ll likely…

  • Develop detailed simulation models for all of Lunar's power conversion systems
  • Create, design, implement, and validate system thermal design through simulation, analysis and testing
  • Identify the correct analysis level for the task at hand ranging from a simple hand calculation to 3D simulation
  • Define and execute test plans to validate component and system performance
  • Drive the design details, schedules, and issues resolution across multiple products, subsystems, and teams helping those who need help to achieve milestones
  • Communicate proposals, results, and specifications through clear, information-rich data visualizations
  • Work with the firmware and controls engineers to integrate the thermal control algorithms into firmware
  • Use simulation and test data from first generation designs to improve next generation products
  • Work with vendors to deliver components and hardware that meet design requirements

Desired Skills:

  • MS or PhD in Mechanical Engineering
  • 8-10 years of experience in designing, simulating, testing, and developing thermal systems
  • Strong desire to launch products going to great lengths to be successful
  • Experience with Python and/or Matlab for data analysis, simulation, design, and building 1D physics based models
  • Fundamental knowledge in CFD/FEA concepts and ability to apply in simulations
  • 3D CAD experience. Onshape experience is a plus.
  • Successful track record working with cross functional teams (EE, FW, GSM, Mfg Eng, Operations, Quality, etc) to develop products and take to manufacturing
  • Motivation to grow current knowledge and skills and own components or products from end to end
  • Troubleshooting skills to resolve issues through the development process with attention to detail for function and cost
  • Experience in value engineering and ability to achieve high levels of form, fit, and function at the most efficient cost
  • Ability and inclination to dive deep with the team to find solutions and turn things around quickly when problems and blockers come up
  • Electrical systems knowledge and basic understanding of electrical circuits and power systems
  • Data acquisition using Labview and National Instruments hardware
  • Lab experience including designing tests, executing test plan, and analyzing results to publish a conclusion
  • Expertise in thermal management of power electronics and battery systems is a plus. 
  • Relevant renewable energy product development experience is a plus
  • Strong data visualization and technical communication skills
  • Demonstrated excellence managing the development of complex thermal systems

Benefits:

We’re dedicated to creating a remarkable employee experience. At Lunar, competitive base pay is one part of our total compensation package. Lunar employees also have the opportunity to become Lunar shareholders by getting equity in a fast-growing company and participating in our employee stock program.

Additional benefits include: 

  • Medical, dental, and vision insurance for employees and dependents
  • Flexible Paid Time Off plus paid holidays
  • Tax deferred 401(k) plan 
  • Paid parental leave for all full time employees including 12 weeks paid parental leave for the birthing mother and 6 weeks paid parental leave for the non-birthing parent 
  •  Subsidized EV charging and pre-tax commuter benefits
  • Cell Phone stipend 

Our DE&I Philosophy: Lunar Energy is an equal opportunity employer. We are committed to attracting, developing and retaining diverse talent by supporting an inclusive workplace. Lunar recruits, hires, trains, promotes, compensates, and administers all personnel actions without regard to race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status or any other status protected by applicable law.

Our Compensation Philosophy: Our goal is to ensure that all Lunar Energy employees are fairly compensated. Please note that the salary range information that follows is a good faith estimate for this position provided pursuant to the Pay Transparency for Pay Equity Act for California applicants. The salary range estimate for this position depending on level of experience is $140,000-$190,000 USD

The actual offer, reflecting the total compensation package & benefits, will be at the company’s sole discretion, and determined by factors including but not limited to years of experience, job level, geographic location, and other relevant business considerations. The company also reserves the right to amend or modify this job description, employee perks, and benefits at any time.

 

Apply for this Job

* Required
resume chosen  
(File types: pdf, doc, docx, txt, rtf)
cover_letter chosen  
(File types: pdf, doc, docx, txt, rtf)


U.S. Standard Demographic Questions We invite applicants to share their demographic background. If you choose to complete this survey, your responses may be used to identify areas of improvement in our hiring process.
How would you describe your gender identity? (mark all that apply)





How would you describe your racial/ethnic background? (mark all that apply)











How would you describe your sexual orientation? (mark all that apply)








Do you identify as transgender? (Select one)




Do you have a disability or chronic condition (physical, visual, auditory, cognitive, mental, emotional, or other) that substantially limits one or more of your major life activities, including mobility, communication (seeing, hearing, speaking), and learning? (Select one)




Are you a veteran or active member of the United States Armed Forces? (Select one)





Voluntary Self-Identification

For government reporting purposes, we ask candidates to respond to the below self-identification survey. Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiring process or thereafter. Any information that you do provide will be recorded and maintained in a confidential file.

As set forth in Lunar Energy’s Equal Employment Opportunity policy, we do not discriminate on the basis of any protected group status under any applicable law.

Race & Ethnicity Definitions

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection. As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measure the effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categories is as follows:

A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability.

A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.

An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.


Voluntary Self-Identification of Disability

Form CC-305
Page 1 of 1
OMB Control Number 1250-0005
Expires 04/30/2026

Why are you being asked to complete this form?

We are a federal contractor or subcontractor. The law requires us to provide equal employment opportunity to qualified people with disabilities. We have a goal of having at least 7% of our workers as people with disabilities. The law says we must measure our progress towards this goal. To do this, we must ask applicants and employees if they have a disability or have ever had one. People can become disabled, so we need to ask this question at least every five years.

Completing this form is voluntary, and we hope that you will choose to do so. Your answer is confidential. No one who makes hiring decisions will see it. Your decision to complete the form and your answer will not harm you in any way. If you want to learn more about the law or this form, visit the U.S. Department of Labor’s Office of Federal Contract Compliance Programs (OFCCP) website at www.dol.gov/ofccp.

How do you know if you have a disability?

A disability is a condition that substantially limits one or more of your “major life activities.” If you have or have ever had such a condition, you are a person with a disability. Disabilities include, but are not limited to:

  • Alcohol or other substance use disorder (not currently using drugs illegally)
  • Autoimmune disorder, for example, lupus, fibromyalgia, rheumatoid arthritis, HIV/AIDS
  • Blind or low vision
  • Cancer (past or present)
  • Cardiovascular or heart disease
  • Celiac disease
  • Cerebral palsy
  • Deaf or serious difficulty hearing
  • Diabetes
  • Disfigurement, for example, disfigurement caused by burns, wounds, accidents, or congenital disorders
  • Epilepsy or other seizure disorder
  • Gastrointestinal disorders, for example, Crohn's Disease, irritable bowel syndrome
  • Intellectual or developmental disability
  • Mental health conditions, for example, depression, bipolar disorder, anxiety disorder, schizophrenia, PTSD
  • Missing limbs or partially missing limbs
  • Mobility impairment, benefiting from the use of a wheelchair, scooter, walker, leg brace(s) and/or other supports
  • Nervous system condition, for example, migraine headaches, Parkinson’s disease, multiple sclerosis (MS)
  • Neurodivergence, for example, attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder, dyslexia, dyspraxia, other learning disabilities
  • Partial or complete paralysis (any cause)
  • Pulmonary or respiratory conditions, for example, tuberculosis, asthma, emphysema
  • Short stature (dwarfism)
  • Traumatic brain injury

PUBLIC BURDEN STATEMENT: According to the Paperwork Reduction Act of 1995 no persons are required to respond to a collection of information unless such collection displays a valid OMB control number. This survey should take about 5 minutes to complete.


Our system has flagged this application as potentially being associated with bot traffic. Please turn off any VPNs, clear your browser cache and cookies, or try submitting your application in a different browser. If this issue persists, please reach out to our support team via our help center.
Please complete the reCAPTCHA above.