Senior Executive Assistant, Office CEO

Senior Executive Assistant, Office of the CEO

We are a dedicated group of scientists, physicians, and business people working together toward one goal: to discover and develop therapies that can unleash the power of the body’s immune system to treat and potentially cure cancer. We are passionate about the work we do every day at Agenus to deliver on the promise of immuno-oncology. If you’re looking for an inspired environment, passionate colleagues, and a culture that nurtures learning, innovation and team success, we invite you to join us.

The Senior Executive Assistant is vital to the CEO's office, managing critical operations and high‑level communication. This role combines advanced administrative duties with personal support, requiring a versatile professional who excels at both organizational and individual tasks. The ideal candidate can seamlessly transition between preparing executive presentations and handling the CEO's personal matters. As the primary contact for top leadership, this position demands someone who thrives under pressure, maintains strict confidentiality, and proactively addresses needs while remaining composed in a fast‑paced environment.

This role is required to be onsite in Lexington, MA five days a week. Monday to Friday, 8:00 AM to 5:30 PM.

• Manage CEO’s complex calendar, including scheduling meetings, travel arrangements, and appointments.
• Arrange & coordinate meetings/events (Board retreats, management dinners, etc.).
• Screen CEO’s emails, archive and compose replies/correspondence on behalf of the CEO when required.
• Prepare reports, presentations (investor, boards, partners) and memos when required.
• Prepare the CEO’s monthly expense summary – personal and business‑related expenses.
• Act as a liaison between the CEO and internal/external stakeholders.
• Handle sensitive and confidential information with utmost discretion.
• Provide high‑level confidential administrative support to CEO first and foremost, and the Senior Leadership team as required.
• Manage all CEO’s memberships & subscriptions and their renewals/payments.

• Manage personal appointments and commitments.
• Coordinate travel logistics, including flights, accommodations, and itineraries.
• Handle personal errands and tasks as needed.
• Manage vendors when required.

• Coordinate with other departments to ensure smooth operations.
• Assist with board meetings and other high‑level gatherings.

• Screen and prioritize incoming communications (emails, calls, mail).
• Draft responses to routine correspondence.
• Serve as a point of contact for important clients and partners.
• Liaise with Leadership team on behalf of the CEO.
• Interact with high‑profile executives from other institutions globally.
• Liaise with internal staff at all levels on behalf of the CEO when required.

• Bachelor’s degree in Business Administration, Communications, or a related field preferred.
• 3‑5 years of executive‑level support, preferably at the CEO/C‑Suite level, and preferably in the biotech or pharmaceutical industry.
• Exceptional time management and prioritization skills.
• Strong interpersonal skills and professional demeanor.
• Adaptability and willingness to learn about the biotech industry.
• Proven ability to handle confidential information with discretion.
• Strong organizational skills that reflect the ability to perform and prioritize multiple tasks seamlessly with excellent attention to detail.
• Willingness to perform office management duties.
• Expert level written and verbal communication skills, including the ability to ask clarifying questions and work with senior management, internal and external clients.
• Superior customer service and interpersonal skills.
• Proactive approaches to problem‑solving and decision‑making capability.
• Proficiency in MS Office suite and other relevant software.
• Flexibility to work outside standard business hours when required.

• Standard work hours are Monday to Friday, 8:00 AM to 5:30 PM.
• Additional flexibility may be required to accommodate the CEO’s schedule and urgent matters.
• Occasional evening or weekend work may be necessary for special events…