Mainspring Energy
Staff Mechanical Engineer, Sealing Systems
Menlo Park, CA · Staff+
Stay score
odds of building a lasting career here
Sponsors, but it's cap-subject — you still face the weighted lottery (~61% per draw at Level IV). Good if you win; have a cap-exempt backup on your list.
Lottery odds assume a STEM candidate.
Personalize to your clock →H-1B wage level
the lottery is wage-weighted — each level is one more entry
$10,437 more — $182,437 — moves this role to Level IV and 4 lottery entries. That figure is inside the range the employer already advertised.
Based on the DOL prevailing wage for this occupation and worksite, a base salary of $182,437 would place this position at wage Level IV. That figure is within the posted range, and I'd like to target it. This role classifies under "Mechanical Engineers" for prevailing-wage purposes.
DOL prevailing wage, 2026-27 wage year · Mechanical Engineers (17-2141) · San Francisco-Oakland-Fremont, CA. Wage level is derived by USCIS from the offered wage, occupation and worksite; the occupation shown is inferred from the job title.
Employer immigration record
from this employer's Department of Labor filings
Files H-1B transfers
Sourced from Department of Labor LCA, PERM and prevailing-wage disclosure data. Employer matching is by name, so figures may be split across an employer's legal entities. Absence of a filing means none appears in our copy of the data, not that none exists.
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About the role
- The company began commercial shipments of its Mainspring Linear Generators in 2020 and today has hundreds of megawatts in advanced development and field operations for leading Fortune 500 companies, data centers, and utilities.
- Getting this right is foundational to the product's low emissions and maintenance business model.
- Progressing the ring service interval is one of the most important development programs at Mainspring.
Responsibilities
- Fluency in Python programming for data analysis, and experience developing and validating simplified models of systems and subsystems to inform failure analysis and design
Requirements
- Master's degree in Mechanical Engineering or equivalent with at least eight years of experience, or a Ph.D. with at least five years of experience
- Experience designing high-performance, precision parts from R&D through to production release
- Ability to generate 2D drawings for manufacturing, including comfort with GD&T
Nice to have
- Excellent understanding of thermodynamics, experience interacting with a complex thermodynamic system.
- Power generation, energy storage, and aerospace (especially turbomachinery or propulsion) are all extremely relevant
- Experience designing for high-cycle fatigue and high-pressure, high-temperature environments.
- Experience with super alloys is a plus
- 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.
- In more traditional words, Mainspring Energy, Inc is an Equal Opportunity Employer.
- Fluency in SolidWorks or a comparable CAD package.
Compensation
- 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.
Benefits
- Mainspring can sometimes be flexible enough to
Company info
- What We're Looking For
This listing is sourced directly from Mainspring Energy's careers page and normalized into a canonical job model.