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Mainspring Energy200–500 employees

Senior Field Service Technician (Long Island, NY)

Long Island, NY$35 – $50/hrPosted 10 days ago

Immigration summary

Visa sponsorship

LikelyLow confidence

This employer sponsors, but not for roles like this one.

26 recent H-1B filings

View visa evidence

Green card sponsorship

Some historyMedium confidence

This employer has recently sponsored green cards.

6 recent certified PERM filings

View green card evidence

Job description

About Mainspring

Mainspring Energy manufactures and delivers fuel-flexible, low-emissions local power solutions that rapidly add new capacity and deliver reliable, affordable, and sustainable electric power. 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. Mainspring also partners with global energy leaders including AEP, NextEra Energy Resources, Schneider Electric, and more.

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 searching for highly motivated, mechanically inclined individuals to join our growing Field Service team. In this position, you will play a direct role in completing planned and reactive service operations on our generators. In this position, you will play a key role in maintaining system uptime, availability, and performance for deployed units on customer sites in a specific region. You will train at our headquarters in Menlo Park, CA, and be assigned to a particular service region requiring travel. For those inclined, there are ample growth opportunities within Mainspring, and we offer full benefits, including vacation and sick time, 401K, and pre-IPO stock options.

Responsibilities

  • Mechanically repair and/or perform maintenance on components and assemblies that make up our generators in accordance with procedures and build checklists in order to meet customer requirements
  • Collaborate with engineers to fix, repair, and redesign components and assemblies
  • Conduct mechanical inspections of deployed units, documenting condition information for use by our team for debugging or troubleshooting
  • Be available to work rotational on-call shifts, as per the written schedule, to provide optimal service and support for our customers
  • Qualifications

  • Minimum of 5 years of experience with mechanical assembly and/or repair. Experience with automotive, aviation, and/or heavy equipment (i.e. HVAC, elevators/lifts, or industrial equipment) assembly a plus
  • Experience with precision measuring, down to .001”, using micrometers, bore gauges, gauge blocks, etc. Also, familiarity with torque wrenches and documentation of repairs performed
  • Candidates must be able to stand for long periods of time, lift to 50 lbs., and wear required PPE
  • Must have knowledge of how to use and maintain basic tools, such as torque wrenches and torque specifications
  • Must have experience with following written and verbal work instructions while on-site
  • Excellent communication skills, software knowledge of Google Workspace is a plus
  • A proven track record for the ability to work well with others as part of a dynamic team
  • Ability to learn quickly, is self-motivated and safety oriented
  • Valid Driver’s license required; Class A Commercial Driver’s License preferred
  • 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.

    Sponsorship evidence

    Why Openbound reached the conclusions above.

    Visa sponsorship evidence

    Current posting

    Silent on sponsorship

    Employer H-1B history

    26
    recent certified H-1B filings
    19
    new-hire petitions
    0
    filings for similar roles
    18
    so far in FY2026
    More evidence details
    • 26 recent certified H-1B filings across the employer
    • Still filing this year — 18 filings in FY2026
    • 3 USCIS H-1B new-employment approvals, counted separately from LCA filings
    • 18 further USCIS approvals for extensions or transfers
    • We checked 54 filing titles for this employer and none describe work like this role
    • The posting says nothing about sponsorship either way
    • No filing activity is recorded for this job's location

    Green card sponsorship evidence

    Employer PERM history

    6
    recent certified PERM filings
    0
    filings for similar roles
    0
    filings in this location
    Certified PERM filings by fiscal year
    20230
    20243
    20258
    20262YTD

    Filing history reflects past employer behavior; it isn't a promise for this opening.

    All open roles at Mainspring Energy
    How Openbound evaluates sponsorship

    Visa history uses official U.S. Department of Labor H-1B LCA disclosure data and USCIS H-1B petition history. Green card history uses DOL PERM disclosure data. Each is read for the employer as a whole, for roles like this one, and for this location, weighted toward the most recent fiscal years.

    An employer is matched to its filing entities by verified legal name and reviewed aliases; a match is never made on a name resemblance alone. Where no verified entity can be matched, the page says so and draws no conclusion from the absence. 54 filing titles were examined for this employer.

    What this posting states outranks history in both directions, and an employer's published policy outranks past filings. Filing history reflects past behavior; it is not a promise of sponsorship for this opening, and none of this is legal advice.