Application Guide
How to Apply for Senior Mechanical Engineer, High Volume Design
at Heirloom
🏢 About Heirloom
Heirloom is a climate tech company pioneering direct air capture technology that uses natural minerals to remove CO₂ from the atmosphere, aiming to capture 1 billion tons by 2035. Unlike many carbon capture startups, Heirloom focuses on scalable, low-cost solutions using abundant materials, making it uniquely positioned to have real climate impact at industrial scale. Working here means contributing directly to a tangible solution for climate change with technology that's both innovative and practical.
About This Role
This Senior Mechanical Engineer role focuses on designing mechanical subsystems for high-volume manufacturing of carbon capture equipment, directly impacting the company's core metric of $/ton CO₂ economics. You'll own end-to-end design from requirements through production ramp, balancing cost, reliability, and manufacturability for components made via stamping, casting, roll forming, and extrusions. Your work will directly scale technology that removes atmospheric carbon at billion-ton scale.
💡 A Day in the Life
You might start the day reviewing reliability test data from a stamped component, then lead a design review for a casting-based subsystem, making trade-off decisions based on cost analysis and manufacturability feedback from suppliers. In the afternoon, you could be modeling failure modes for a high-volume assembly, then collaborating with the systems team to ensure your mechanical designs optimize the overall $/ton CO₂ economics of the carbon capture system.
🚀 Application Tools
🎯 Who Heirloom Is Looking For
- Has 5+ years experience taking mechanical products from concept through high-volume production (not just prototyping), with portfolio examples of components manufactured via stamping, casting, or similar processes
- Demonstrates strong Design for Reliability (DfR) expertise through specific examples of failure mode analysis, accelerated life testing, and reliability modeling that led to durable design improvements
- Can articulate how they've used first-principles analysis and data-driven methods to make design trade-offs that optimized cost, manufacturability, and performance simultaneously
- Shows passion for climate tech and understanding of how mechanical engineering decisions impact system economics in capital-intensive industries
📝 Tips for Applying to Heirloom
Quantify your high-volume design experience: specify production volumes you've designed for (e.g., 'designed components for 100k+ unit/year production'), and name specific manufacturing processes you've used beyond just 'CAD'
Highlight DfR experience with concrete examples: describe a specific failure mode you identified, the testing methodology you used, and how the design changed as a result
Connect your experience to Heirloom's mission: explain how your mechanical design work could impact $/ton CO₂ economics, not just product performance
Show manufacturing process expertise: detail your experience with at least two of the listed processes (sheet metal stamping, casting, roll forming, extrusions) with component examples
Demonstrate full lifecycle ownership: provide examples where you drove a subsystem from requirements definition through production ramp, not just the design phase
✉️ What to Emphasize in Your Cover Letter
['Specific examples of designing for high-volume manufacturing (quantities, processes, cost optimization)', 'Demonstrated application of Design for Reliability principles with measurable outcomes', 'Experience making design trade-offs that balance technical requirements with business economics', 'Passion for climate tech and understanding of how mechanical engineering scales carbon removal']
Generate Cover Letter →🔍 Research Before Applying
To stand out, make sure you've researched:
- → Heirloom's specific technology approach: understand their mineral-based direct air capture process and how mechanical systems enable it
- → The company's scaling timeline and partnerships: review their announced facilities and manufacturing partners
- → Carbon removal economics: research current $/ton costs for direct air capture and what drives those costs
- → Heirloom's leadership team and investors: understand their technical and commercial credibility in climate tech
💬 Prepare for These Interview Topics
Based on this role, you may be asked about:
⚠️ Common Mistakes to Avoid
- Focusing only on CAD skills or prototyping without demonstrating high-volume production experience
- Generic climate passion without connecting it to specific mechanical engineering contributions to carbon removal economics
- Listing manufacturing processes without concrete examples of components you've designed using those processes
📅 Application Timeline
This position is open until filled. However, we recommend applying as soon as possible as roles at mission-driven organizations tend to fill quickly.
Typical hiring timeline:
Application Review
1-2 weeks
Initial Screening
Phone call or written assessment
Interviews
1-2 rounds, usually virtual
Offer
Congratulations!