USD 128,000–150,000 per year

Senior Executive Assistant

United StatesUnited States·Menlo Parksenior
Executive AssistantAdministration & Office Support
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Quick Summary

Overview

About Mainspring Mainspring Energy manufactures and delivers fuel-flexible, low-emissions local power solutions that rapidly add new capacity and deliver reliable, affordable,

Technical Tools
Executive AssistantAdministration & Office Support

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
We are seeking a highly proactive, detail-oriented, and adaptable Senior Executive Assistant to provide high-level administrative, operational, and strategic support to members of our Executive Leadership Team. Reporting directly to the SVP, People Operations, this role will initially support the Chief Financial Officer (CFO) and General Counsel, and will expand to two additional executives.
 
In this role, you will act as a trusted operational partner, force multiplier, and active collaborator across the business. Operating in a fast-paced environment, you will work closely with other Executive Assistants to foster an open, aligned, and collaborative administrative network. The ideal candidate anticipates needs before they arise, exercises exceptional judgment, and manages complex schedules, travel, and confidential communications with seamless precision and diplomatic tact.
  • EA Network Collaboration: Partner closely with other Executive Assistants across the organization to ensure seamless cross-functional alignment, shared best practices, coverage support, and cohesive communications across all executive functions

  • Operational & Project Support: Drive or assist with special administrative initiatives, leadership projects, and executive-led programs from kickoff through execution

  • Cross-Functional Connection: Build strong, collaborative relationships across teams (People Ops, Finance, Legal, Operations) to keep internal workflows transparent and information moving smoothly

  • Experience: 7+ years of experience supporting executive leadership (C-suite, General Counsel, VP level), ideally within a fast-paced, high-growth environment
  • Reporting Structure: Experience reporting into HR/People Operations while partnering across multiple senior executive stakeholders
  • Work Arrangement: Ability and willingness to work a hybrid schedule (on-site [X] days/week in our [City, State] office)
  • Technical Skills: Advanced proficiency in Google Workspace; experience with expense platforms (e.g., Concur, Ramp, Brex) and project management platforms (e.g., Asana, Notion)
  • Communication & Discretion: Exceptional written and verbal communication skills; absolute integrity and mature judgment when handling confidential financial, legal, and personnel matters
  • Collaboration & Problem-Solving: Strong team-player orientation with a track record of building positive relationships with fellow EAs, internal teams, and external stakeholders under fast-paced conditions
  • Bachelor’s degree in Business Administration, HR, Communications, or a related field
  • Experience supporting Finance and/or Legal executive functions
  • Background in coordinating hybrid leadership retreats, offsites, or company-wide events
  • 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.

    Location & Eligibility

    Where is the job
    Menlo Park, United States
    On-site at the office
    Who can apply
    US

    About this job

    Pay per year
    $128,000–$150,000 a year
    46% above the $95,000 median for Executive Assistant jobs on Jobera (355 salaries).
    Who can apply
    United States
    Posted
    Today
    Employer
    has 91 open jobs on Jobera in 2 countries.

    Listing Details

    Posted
    October 26, 2026
    First seen
    October 27, 2026
    Last seen
    October 27, 2026

    Posting Health

    Days active
    0
    Repost count
    0
    Trust Level
    79%
    Scored at
    October 27, 2026

    Signal breakdown

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    Senior Executive AssistantUSD 128,000–150,000 per year