Brisbane, California, United States · On-site
$30/hr–$34/hr
THE ROLE We are seeking a Mechanical Engineering Intern to join Heirloom’s Mechanical Team for the upcoming Fall/Water for a 10-12 week internship. In this role, you will support the design, build, and deployment of next…
Skills: Mechanical design, CAD modeling, Prototyping, Engineering analysis, FEA
Brisbane, California, United States · On-site
$145k–$210k/yr
The Role As a Senior Mechanical Engineer within the Mechanical Department, you will own the design and execution of complex mechanical subsystems that directly influence the economics, reliability, and scalability of our…
Skills: Mechanical design, Product lifecycle management, Design for reliability, First-principles analysis, Tolerance analysis
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The intern will support the mechanical design, prototyping, and assembly of carbon removal hardware systems. They will also conduct engineering analyses, perform root cause investigations, and collaborate with cross-functional teams to document design improvements.
Candidates must be pursuing or have recently completed a degree in Mechanical Engineering or a related field. Strong foundational knowledge in engineering principles and hands-on experience with hardware fabrication or testing are required.
We are seeking a Mechanical Engineering Intern to join Heirloom’s Mechanical Team for the upcoming Fall/Water for a 10-12 week internship. In this role, you will support the design, build, and deployment of next-generation carbon removal systems. This is an opportunity for someone who wants hands-on ownership, exposure to industrial-scale hardware, and experience working in a fast-paced climate tech startup.
Depending on your strengths and team priorities, you may:
Support mechanical design of subsystems and components (structures, mechanisms, machine design)
Develop CAD models and 2D drawings for fabrication
Assist with prototyping, assembly, and field testing of hardware
Conduct engineering analyses (tolerance stacks, FEA, etc.)
Support root cause investigations and design improvements on equipment
Help document designs, test results, and lessons learned
Collaborate cross-functionally with process, electrical, controls, and operations teams
You’ll leave the internship having directly contributed to hardware that captures CO₂ from the atmosphere.
Pursuing a BS or MS in Mechanical Engineering (or related field) or have recently graduated
Hands-on experience building things (lab work, shop experience, project teams, internships, personal projects)
Strong understanding of engineering fundamentals (statics, dynamics, kinematics, thermodynamics, fluid mechanics)
3D CAD experience
Engineering testing methodology; ability to design experiments and collect data
Self-starter, critical thinker, and problem-solving skills
Team player with excellent verbal & written communication and interpersonal skills
Familiarity with formal engineering documentation (ANSI mechanical drawings, electrical schematics, Process & Instrumentation Diagrams)
Hands-on fabrication experience: e.g. woodworking, machining, welding, etc.
Mechatronics systems experience (e.g. Arduino, Raspberry Pi or similar with motion components)
Familiarity with kinematic systems (e.g. gears, belts, leadscrews, linkages, etc.)
Experience on robotics, solar car, formula SAE, or similar engineering teams
Internship Duration: 10-12 weeks (6 month co-ops also will be considered)
Start date: Anytime between September 2026 and January 2027
Compensation:
Comp will be: $5,000 relocation/housing allowance paid upfront plus hourly pay.
Juniors: $30/hour
Seniors/grads: $34/hour
You don’t have to have every listed requirement and skill to be a great fit. If you are passionate about this opportunity and think you have the skills to succeed, please apply!
We encourage you to apply if you identify as Black, Native Hawaiian or Pacific Islander, American Indian or Alaskan Native, Hispanic or Latino, LGBTQ+ – or with any other underrepresented group – even if you don’t tick all the boxes in the description below.
Excellent health, dental and vision insurance covered up to 100% by Heirloom. FSA option.
16 weeks paid parental leave for all Heirloom employees.
Generous stock options.
Unlimited PTO for exempt (salaried) employees & 120 hours for full time non-exempt (hourly) employees.
401(k).
Monthly health and wellness reimbursement.
Annual education and conference budget.
Radical Honesty. We strive to foster an inclusive environment premised on transparency and respect. We push for excellence, yet always remain thoughtful when challenging each other.
Persistent Optimism. We show up to work with optimism and don’t shy away from a challenge. We recognize that the ambitious nature of our mission requires hopefulness, dedication, and persistence.
Maximize Learning. Compounding knowledge is our key to victory - we continuously hone our crafts, seek the fastest paths to improve, and are quick to absorb and apply new insights.
We are solving the challenge 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 are a world-class team. We are engineers, scientists, and concerned humans from a variety of backgrounds and experiences who are pooling our knowledge and skills to collectively build a more equitable, prosperous future for all.
We remain united, resilient, and optimistic. We recognize the magnitude of the challenge ahead of us, yet believe that we can contribute to mitigating the worst effects of climate change. It won’t be easy, but we won’t quit.
We are backed by credible climate partners. 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.
Mitigating the worst impacts of climate change by developing the world’s most cost-effective CO2 removal technology
Mitigating the worst impacts of climate change by developing the world’s most cost-effective DAC technology to permanently remove CO2 from the atmosphere. Our technology rapidly accelerates the natural processes that enable limestone to absorb carbon dioxide from the air from a timespan of years to days. In 2023, Heirloom established the first and only Direct Air Capture facility in North America that permanently captures CO2. Our customers are the world’s biggest buyers of carbon removal including Microsoft, JP Morgan, McKinsey, Stripe, Shopify and more.
Offices: San Francisco, CA, US
Mitigating the worst impacts of climate change by developing the world’s most cost-effective CO2 removal technology
Mitigating the worst impacts of climate change by developing the world’s most cost-effective DAC technology to permanently remove CO2 from the atmosphere. Our technology rapidly accelerates the natural processes that enable limestone to absorb carbon dioxide from the air from a timespan of years to days. In 2023, Heirloom established the first and only Direct Air Capture facility in North America that permanently captures CO2. Our customers are the world’s biggest buyers of carbon removal including Microsoft, JP Morgan, McKinsey, Stripe, Shopify and more.
Offices: San Francisco, CA, US
