Executive Assistant

What if… you could join an organization that creates, resources, and builds life sciences companies that invent breakthrough technologies in order to transform health care and sustainability?

Company Description

Expedition Medicines is a privately held, early-stage biotechnology company pioneering the emerging field of Protein Editing. At Expedition Medicines we create small molecules that edit protein structure and function to unlock presently undruggable targets and a broad array of therapeutic modalities. Our platform integrates novel small molecule chemistry and chemoproteomic discovery technologies with Machine Learning (ML) to enable generative design. Expedition Medicines is backed by Flagship Pioneering, bringing their courage, vision, and resources to guide Expedition Medicines from platform validation to patient impact. We are seeking collaborative, relentless problem solvers that share our passion for impact to join us! 

The Role

Expedition Medicines is seeking a highly organized, proactive Executive Assistant to support four senior level executives. This role is central to keeping the leadership team running smoothly and the office operating effectively day to day. The Executive Assistant will be a trusted partner to the executives, managing calendars and logistics, supporting onboarding, and helping foster a positive, connected company culture.

The ideal candidate is detail-oriented, adaptable, and comfortable operating in a fast-paced, scientific startup environment.

What You’ll Do

Executive & Administrative Support

• Manage complex calendars for multiple executives, prioritizing meetings and resolving scheduling conflicts.
• Coordinate meetings, prepare agendas when needed, and ensure clear follow-ups.
• Draft, edit, and manage internal and external communications on behalf of executives.
• Handle confidential information with discretion and professionalism.

Travel & Logistics

• Coordinate domestic and international travel, including itineraries and expense reporting.
• Support ad hoc logistical needs for leadership as they arise.

Office Management

• Support day-to-day office operations, helping ensure the office runs smoothly and is welcoming for employees and visitors.
• Partner with internal teams and vendors on office-related needs (supplies, space coordination, events).

Onboarding & Team Support

• Support onboarding of new hires, including scheduling, coordination with internal teams, and ensuring a smooth first-day experience.
• Serve as a point of contact for new employees as they get oriented to the office and company.

Culture & Events

• Help build and maintain a strong company culture by coordinating team events, celebrations, and offsites.
• Act as a cultural ambassador, contributing to an inclusive, collaborative, and positive work environment.

Who You Are

• Bachelor’s degree required.
• 5+ years of experience supporting senior executives, preferably in a startup, biotech, or fast-paced environment.
• Highly organized with exceptional attention to detail and strong follow-through.
• Comfortable managing multiple priorities and shifting demands.
• Excellent written and verbal communication skills.
• Professional, discreet, and trusted with sensitive information.
• Proactive and resourceful — you anticipate needs, take initiative, and exhibit extreme ownership.
• Strong interpersonal skills and a positive, collaborative working style; experience collaborating with other EAs on shared tasks.
• Proficient in Outlook calendaring, Microsoft Office (Word, PowerPoint, Excel), Slack, and Notion.
• Able to work on-site in the Cambridge office most days to support executives and the team.

ABOUT FLAGSHIP PIONEERING

Flagship Pioneering invents and builds platform companies, each with the potential for multiple products that transform human health, sustainability and beyond. Since its launch in 2000, Flagship has originated more than 100 companies. Many of these companies have addressed humanity’s most urgent challenges: vaccinating billions of people against COVID-19, curing intractable diseases, improving human health, preempting illness, and feeding the world by improving the resiliency and sustainability of agriculture.  

Flagship has been recognized twice on FORTUNE’s “Change the World” list, an annual ranking of companies that have made a positive social and environmental impact through activities that are part of their core business strategies and has been twice named to Fast Company’s annual list of the World’s Most Innovative Companies. Learn more about Flagship at www.flagshippioneering.com.

At Flagship, we accept impossible missions to enable bigger leaps. Our core values guide us through uncertainty and toward lasting impact.

We are an equal opportunity employer. All qualified applicants will be considered for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic protected by law.

We recognize that great candidates often bring unique strengths without fulfilling every qualification. If you have some of the experience listed above but not all, please apply anyway. We are dedicated to building diverse and inclusive teams and look forward to learning more about your background and interest in Flagship.

Recruitment & Staffing Agencies: Flagship Pioneering and its affiliated Flagship Lab companies (collectively, “FSP”) do not accept unsolicited resumes from any source other than candidates. The submission of unsolicited resumes by recruitment or staffing agencies to FSP or its employees is strictly prohibited unless contacted directly by Flagship Pioneering’s internal Talent Acquisition team. Any resume submitted by an agency in the absence of a signed agreement will automatically become the property of FSP, and FSP will not owe any referral or other fees with respect thereto.

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The salary range for this role is $108,000 - $148,500. Compensation for the role will depend on a number of factors, including a candidate’s qualifications, skills, competencies, and experience. Expedition Medicines currently offers healthcare coverage, annual incentive program, retirement benefits and a broad range of other benefits. Compensation and benefits information is based on Expedition Medicines's good faith estimate as of the date of publication and may be modified in the future.