Thermal/Mechanical Design Engineer

San Francisco, CA /
Engineering /
Full Time
About Us 
All across the world, from the azure pools of Turkey and Oman to the travertine terraces of Yellowstone, our planet quietly pulls carbon dioxide from the air and turns it to stone. For eons, Earth has relied on this process to balance its carbon cycle. What if it could be harnessed? What if we could do it faster, in larger quantities, and at a low enough cost to make it an effective tool in the fight against climate change? 

At Heirloom, we are turning that into reality. We use the natural carbon capture properties of abundant minerals to pull CO2 from the air, and store it permanently underground. We come to work every day to slow climate change, and are united behind a single, common goal - to remove 1 billion tons of CO2 from the sky by 2035, and to not stop before we get there.  

We bring together the precise recipe of science, technology, know-how, and strategy necessary to make low cost, high quality carbon removal a reality. If we’re successful, we will directly mitigate climate change, build a world we can proudly hand over to our children and grandchildren, and catalyze an industry that will rival the largest the world has ever seen. If you want to change the planet, come join us. 

Our Commitment to Diversity, Equity, and Inclusion 
Heirloom is committed to diversity and building an equitable and inclusive environment for people of all backgrounds and experiences.  We believe wholeheartedly that building a diverse company is critical to Heirloom’s success.  We especially encourage members of traditionally underrepresented communities to apply, including women, people of color, LGBTQ+ people, veterans, and people with disabilities. 

The Role
You will design and build the mechanical systems to capture and measure the CO2 we capture from the air we breathe.  While our laboratory results demonstrate the general concept, we must scale from lab bench to industrial scales.  You will help shape and drive exploratory research and development phases to evaluate and test new ideas and setups.  You revel in both complexity and uncertainty and delight in breaking down and translating huge problems into actionable and testable systems requirements.  As we scale, you will help us design and build the infrastructure necessary to operate at the industrial levels necessary to effect global change on our CO2 footprint.  Your work has the potential to directly shape our fight against climate change. 

What you will do

    • Use 3D tools to design, build, and test our novel enhanced weathering methodology to capture CO2 at massive scale in the billions of tons
    • Get hands-on to design, build, and test rapid proof of concept prototypes
    • Independently execute on and troubleshoot designs
    • Define and design product modules to support offsite fabrication and assembly with reduced onsite construction.
    • Drive system level analysis to consider trade-offs between function, deployment time, operational costs, and capital  investment
    • Work closely with controls and systems engineers, we are looking for very interdisciplinary individuals with different experience levels.

What you will bring

    • We are looking for candidates with different experience levels ranging from 7 to 10+ years of experience.
    • BS / MS in Mechanical Engineering (or equivalent)
    • Knowledge of pyrolysis, gasification or other thermal conversion processes
    • Strong technical fundamentals in propulsion, fluid mechanics, thermodynamics, and structural analysis
    • Experience with reactors and other chemical plant equipment
    • Experience with solids , fluid handling, solid gas separation and associated equipment
    • A self-starter who is comfortable driving multiple parts of the product design process simultaneously.
    • Basic understanding of control systems and electronics
    • Ability to take an analytical approach to problem definition.

    • You don’t have to have every listed requirement and skill to be a great fit - you may even teach us something about what we should be looking for! If you are passionate about this opportunity and think you have the skills to succeed, please apply! 

Bonus Points

    • Experience in large assembly shipping, handling, and rigging
    • Experience with plumbing and electrical routing
    • Familiar with construction methods, with an emphasis on modularity.
    • Catia, NX, or Solidworks experience
    • Experience designing heat exchangers.

Our Principles

    • Radical Honesty means we are open, transparent, and inclusive in everything we do. We aren't scared to challenge each other, but bring clear motives and our best intentions when we do.
    • Persistent Optimism means we carry an infinite amount of optimistic energy with us on our journey, constantly chipping away at what may seem insurmountable.
    • Continual Discovery means we maximize our learning rate.  Compounding knowledge is our key to victory - we continuously hone our crafts, seek the fastest paths to new learning, and are quick to absorb new knowledge.

Why you should join Heirloom

    • We are solving the engineering problem of our generation.  Climate change is an existential threat, and we need as many of the world’s motivated minds as possible to help. There is no greater challenge or opportunity than fighting climate change. 
    • We have done this before.  We’re engineers, scientists, and concerned humans from companies like Tesla, Apple, Plenty and Google, and Universities like Penn and Berkeley. We’ve built technology used by millions of people around the world, and we’re using that experience to build a more equitable, prosperous future for all.
    • We are a united, resilient, and optimistic bunch.  We are all here for the same reason - to slow climate change. We recognize the magnitude of the challenge ahead of us, and believe we can solve it. We can see a hopeful future where we eventually reverse climate change. It won’t be easy, but we won’t quit.
    • We are backed by the best climate partners in the world.  We’re well funded by investors from Breakthrough Energy Ventures, Ahren Innovation Capital, Carbon Direct, Microsoft, Lowercarbon Capital, ARPA-e and the National Science Foundation. Our early customers include Stripe, Shopify, and Klarna, and we’re building durable partnerships that enable us to tackle this decades-long problem.

Perks and Benefits

    • Covered health, dental and vision.  Health, dental and vision insurance covered by Heirloom.
    • Generous parental leave.  16 weeks paid leave for all Heirloom employees, regardless of primary/secondary caregiver status.
    • Generous stock options
    • Flexible time off.  Unlimited PTO for exempt (salaried) employees & 80 hours for full time non-exempt (hourly)  employees.
    • Stay healthy.  Monthly health and wellness reimbursement.
    • Learn on the job.  Robust annual education and conference budget, including airfare and hotel costs.
Please note: while we appreciate all applicants, only those chosen for an interview will be contacted by our team.