Senior Executive Assistant

Mainspring Energy•Menlo Park, CA

5d•$128,000 - $150,000•Onsite

About The Position

Mainspring Energy is seeking a highly proactive, detail-oriented, and adaptable Senior Executive Assistant to provide high-level administrative, operational, and strategic support to members of its Executive Leadership Team. Reporting directly to the SVP, People Operations, the role will initially support the Chief Financial Officer and General Counsel, with support expanding to two additional executives. The Senior Executive Assistant will serve as a trusted operational partner, force multiplier, and collaborator across the business. In a fast-paced environment, the role works closely with other Executive Assistants to support an open, aligned, and collaborative administrative network. The successful candidate anticipates needs, exercises exceptional judgment, and manages complex schedules, travel, and confidential communications with precision and diplomatic tact. The position is based onsite at Mainspring's Menlo Park headquarters. The listed annual salary range is $128,000–$150,000, adjusted for local market conditions and employee experience. Mainspring also offers pre-IPO stock options and benefits.

Requirements

At least 7 years of experience supporting executive leadership at the C-suite, General Counsel, or VP level, ideally in a fast-paced, high-growth environment.
Experience reporting into HR or People Operations while partnering with multiple senior executive stakeholders.
Ability and willingness to work a hybrid schedule; the posting also states the position is onsite at the Menlo Park headquarters.
Advanced proficiency in Google Workspace.
Experience with expense platforms such as Concur, Ramp, or Brex and project management platforms such as Asana or Notion.
Exceptional written and verbal communication skills.
Absolute integrity and mature judgment when handling confidential financial, legal, and personnel matters.
Strong team-player orientation and a track record of building positive relationships with fellow Executive Assistants, internal teams, and external stakeholders in fast-paced conditions.

Nice To Haves

Bachelor's degree in Business Administration, HR, Communications, or a related field.
Experience supporting Finance and/or Legal executive functions.
Background coordinating hybrid leadership retreats, offsites, or company-wide events.

Responsibilities

Manage, align, and balance supported executives' complex calendars, proactively resolving conflicts and optimizing their time.
Prepare briefing materials, agendas, background research, and presentations for leadership meetings, board discussions, and external partner interactions.
Screen and prioritize incoming requests and communications; draft correspondence and handle sensitive or confidential inquiries with discretion, tact, and diplomacy.
Coordinate complex domestic and international travel, including flights, accommodation, ground transportation, itineraries, and travel documentation.
Track, compile, and reconcile monthly expense reports and credit card statements in accordance with company finance policies.
Collaborate with other Executive Assistants to support cross-functional alignment, shared best practices, coverage, and cohesive communications across executive functions.
Drive or assist with special administrative initiatives, leadership projects, and executive-led programs from kickoff through execution.
Build collaborative relationships across People Operations, Finance, Legal, and Operations to support transparent workflows and smooth information flow.