Senior Executive Assistant

Mainspring Energy•Menlo Park, CA

3d•Onsite

About The Position

Mainspring Energy is seeking a 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 to the SVP, People Operations, the role will initially support the CFO and General Counsel and later expand to support two additional executives. The assistant will serve as a trusted operational partner and collaborate across the business in a fast-paced environment, working with other Executive Assistants to promote an aligned and collaborative administrative network. The position is onsite at Mainspring’s Menlo Park headquarters. Salary is $128,000–$150,000 per year, 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 onsite; the posting also references a hybrid schedule but does not specify the number of onsite days.
Advanced proficiency in Google Workspace.
Experience with expense platforms such as Concur, Ramp, or Brex.
Experience with 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 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.
Experience coordinating hybrid leadership retreats, offsites, or company-wide events.

Responsibilities

Manage, align, and balance complex calendars for supported executives, proactively resolving conflicts and optimizing their schedules.
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 professional 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 executive communications.
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 keep workflows transparent and information moving smoothly.