Senior Administrative & Office Operations Lead

CellCentric Limited; Burlington (MA); On-site; USD 55,000 - 85,000; Full time

Job summary

CellCentric is seeking a Senior Administrative Assistant to provide high-quality administrative and operational support to the organization, with primary responsibility for the Burlington, MA office. The role requires excellent judgment, organization, and adaptability in a fast-paced biotech environment.

You will support senior leaders, manage complex calendars, coordinate travel, and handle confidential information with discretion.

Qualifications

• 5+ years of administrative, executive support, office management, or related experience; experience supporting senior leaders strongly preferred.
• Proven ability to manage multiple priorities, calendars, deadlines, and stakeholders in a fast-moving environment.
• Strong proficiency with Microsoft Outlook, Word, PowerPoint, Excel, Teams, and other standard business applications.
• Excellent written and verbal communication skills and the ability to interact professionally with employees, executives, Board members, visitors, vendors, and external partners.
• Strong attention to detail, follow-through, and organizational skills.
• Sound judgment and discretion with confidential information.
• Proactive, resourceful, independent, and able to solve problems without direction.
• Flexible and able to shift priorities as the organization grows.
• Experience in biotechnology, pharmaceutical, life sciences, or fast-paced professional environments is preferred.
• Ability to work both independently and collaboratively within a team.

Responsibilities

• Provide proactive administrative support to senior leaders, including calendar management, coordinating meetings, travel, and expense reporting.
• Own day-to-day administration and office operations for the Burlington office, ensuring resources and support for U.S. employees.
• Coordinate internal and external meetings, rooms, AV, catering, materials, and logistics.
• Support company and leadership meetings, events, and other U.S.-based activities, including venues and travel.
• Serve as a key administrative resource for U.S. employees, directing questions to appropriate resources.
• Partner with HR on onboarding/offboarding and first-day logistics for U.S. employees.
• Coordinate visitors, deliveries, building access, and reception needs at the Burlington office.
• Liaise with facilities, IT, vendors to maintain office and equipment.
• Manage office supplies and inventory; identify cost-saving opportunities.
• Create/edit/proofread/format presentations, documents, reports, and communications.
• Handle confidential information with discretion and professionalism.
• Anticipate needs, identify issues, and take initiative with minimal direction.
• Provide additional administrative and project support across the U.S. organization as needed.

Job description

CellCentric is seeking a Senior Administrative Assistant to provide high-quality administrative and operational support to the organization, with primary responsibility for the Burlington, MA office. The role requires excellent judgment, organization, and adaptability in a fast-paced biotech environment.

You will support senior leaders, manage complex calendars, coordinate travel, and handle confidential information with discretion.