Executive Assistant

Commonwealth Fusion Systems•Devens, MA

5d•$90,000 - $145,000•Hybrid

About The Position

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy. Combining decades of research, top talent, and new technologies, weâre designing and building commercially viable fusion power plants. And working with policymakers and suppliers to build the energy industry of the future. Weâre in the best position to make it happen. Since 2018, weâve raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world. Now weâre looking for more thinkers, doers, builders, and makers to join us. People whoâll bring new perspectives, solve tough problems, and thrive as part of a team. If thatâs you and this role fits, we want to hear from you. Join the power movement as an Executive Assistant Weâre looking for an experienced Executive Assistant to join our high-performing People Operations team. This role supports multiple C-Suite executives and works alongside four other EAs who collectively ensure the executive team is well-coordinated, informed, and focused on what matters most. The ideal candidate thrives in a fast-moving, high-growth environment and knows how to bring structure, organization, and calm to the chaos that often comes with start-up life. Youâre the type who anticipates needs before theyâre spoken, stays two steps ahead, and takes pride in being known for your reliability, judgment, and professionalism.

Requirements

7+ years of experience as an Executive Assistant, with direct support to multiple executives at the C-suite or senior leadership level
Proven success in fast-paced, startup or high-growth environments, with the ability to stay organized and calm under pressure
Strong attention to detail and commitment to delivering high-quality work consistently
Exceptional written and verbal communication skills
Demonstrated ability to work independently while also thriving as part of a team
High emotional intelligence (EQ) - able to read a room, build trust quickly, and navigate sensitive situations with professionalism and empathy
A reputation for reliability, discretion, and sound judgment, someone leaders can depend on without hesitation
Tech-savvy with strong proficiency in tools such as Google Workspace, Slack, Zoom and Teams
Perform activities such as stooping, climbing, typing, standing, or sitting for extended periods of time
Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics
Willingness to travel or work required nights/weekends/on-call occasionally

Responsibilities

Provide proactive administrative support to multiple C-Suite executives, including complex calendar management, travel coordination, expense reporting, and document preparation
Serve as a trusted partner and representative for executives, ensuring timely communication and follow-through on priorities
Manage competing priorities and maintain confidentiality with the highest level of discretion
Coordinate and host on-site meetings and visits, including managing catering orders, greeting guests, and ensuring meeting spaces are properly set up and equipped
Partner closely with the broader EA team to ensure seamless communication, scheduling alignment, and support coverage across the executive suite
Anticipate logistical and operational needs, identify gaps, propose solutions, and execute without being asked twice
Support cross-functional coordination between executives and their teams, acting as a connector and communicator when needed
Adapt to shifting priorities and feedback while maintaining a positive, composed, and professional approach