Cost Engineer

The core values that ground our work, guide our decisions, and connect us together:
Pragmatic Optimism
Excellence without Ego
Proactive Collaboration

Job Overview
We are seeking a motivated and detail-oriented Cost Engineer to join our SC PM & Cost Engineering team. This position provides an excellent opportunity to gain hands-on experience in supply chain cost analysis and optimization strategies, should-cost modeling, and capacity reporting inside a fast-moving hardware environment. You will work closely with the experienced team members to support BOM cost roll-ups, cost-down tracking, and capacity planning, while building the analytical and cross-functional skills to grow into more senior cost engineering ownership over time.

Key Responsibilities
Cost Analysis & Should-Cost Support

Assist in conducting cost analysis across the supply chain — procurement, manufacturing, transportation, and distribution — in support of BOM cost roll-up and forecasting activities

Help build and maintain should-cost and cost models to evaluate the impact of different scenarios on overall BOM cost, working under the guidance of the Cost Engineering Program Manager

Research and track market trends for key cost drivers (raw material prices, labor costs, logistics rates) and summarize findings to support forecasting and cost planning

Capacity Planning & Reporting Support

Support the team’s capacity management process by helping compile and maintain supply and production capacity data across commodities

Help develop and maintain a cost/capacity tracking database or dashboard (e.g., Smartsheet, Quickbase, Tableau, Power BI, or equivalent) to support cost reduction and capacity visibility efforts

Prepare clear, data-driven reports and visuals to communicate cost and capacity metrics and project progress to stakeholders

Cross-Functional Support & Project Execution

Collaborate with cross-functional teams — procurement, engineering, commodity management, and finance — to collect and validate cost and capacity data

Support the tracking of cost-savings initiatives, providing status updates and reporting to the team as needed

Assist in maintaining project tracking so cost and capacity data stays current and accurate

Support supplier engagement efforts to understand cost structures, identify cost-saving opportunities, and maintain pricing transparency

Participate in ad-hoc projects and process-improvement initiatives as assigned

Qualifications & Requirements
Bachelor’s degree in Engineering, Supply Chain Management, or a related field

1–3 years of relevant experience (full-time experience in cost analysis, supply chain, or a related analytical role)

Strong analytical skills with proficiency in spreadsheet-based data analysis (Excel, Google Sheets); comfort working with BOM or cost data

Excellent written and verbal communication skills, with the ability to work effectively across teams

Detail-oriented with strong organizational skills and the ability to manage multiple tasks simultaneously

Eagerness to learn, take feedback well, and take on new challenges in a fast-paced, evolving environment

Preferred Qualifications
Familiarity with ERP systems or supply chain planning software

Exposure to PLM systems (e.g., Enovia or equivalent) or willingness to learn one

Foundational understanding of supply chain principles — logistics, procurement, and inventory management

Prior internship or project experience in cost analysis, data analysis, capacity planning, or supply chain

Experience with dashboard or database tools (e.g., Tableau, Power BI, Smartsheet, Quickbase) is a plus

Experience using AI-powered tools (e.g., Claude or similar large language model platforms) to speed up analysis or reporting is a plus

This is a hybrid position (onsite + remote) at our Menlo Park HQ. It will require you to be onsite as required to perform testing, troubleshooting, manufacturing support, etc. The salary will be adjusted to reflect local market conditions based on employee location as well as the experience of the employee. Along with the base salary, Mainspring offers pre-IPO company equity through Restricted Stock Units (RSUs) + benefits.

Does your experience not meet all of our posted requirements? Studies have shown that some people are less likely to apply to positions unless they meet every listed requirement. At Mainspring, we are committed to building a diverse, inclusive, flexible, and collaborative environment, so if you want to help us transition the world to clean and affordable electricity, and don’t meet all posted requirements for a particular role, we’d still love to hear from you. Mainspring can sometimes be flexible enough to shift responsibilities for the right person, or otherwise identify open or upcoming roles that may better fit your professional background.
In more traditional words, Mainspring Energy, Inc is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.
This compensation and benefits information is based on Mainspring Energy's estimate as of the date of publication and may be modified in the future. We generally do not negotiate on salary once we have made an offer. The level of pay within the range will depend on a variety of job-related factors that may include location, relevant prior experience and/or education, or particular skills and expertise. New hires joining the company tend to be paid within the starting base pay range noted above, with opportunities to increase pay over time based on development of additional skills, competencies, and company-specific knowledge.