Senior Administrative Assistant

Job Description

The Senior Administrative Assistant is responsible for providing comprehensive executive‑level administrative support to senior executive leaders. This role ensures day‑to‑day executive efficiency and department productivity, fosters a positive work environment, and supports service line leader effectiveness. The ideal candidate is highly organized, proactive, and thrives in a fast‑paced, collaborative environment.

• Provide high quality executive administrative support to senior leaders of the Boston office including but not limited to – coordinate and manage office meetings, appointments, agenda preparation, billing, meeting logistics and related needs.
• Manage complex calendars and scheduling for department/service line and executive leaders, including coordination of meetings across multiple time zones and prioritization of requests.
• Prepare, edit, and format business documents, spreadsheets, presentations, including PowerPoint and other materials as required.
• Coordinate travel arrangements, prepare and process expense reports, and track reimbursements per firm policies.
• Facilitate onboarding activities for service line hires including agenda preparation, training coordination, meeting scheduling, pre‑arrival communication and appropriate follow‑up to ensure a seamless experience for all team members.
• Collaborate with service line and business operational team members on initiatives and projects supporting the business.
• Handle all matters with discretion and confidentiality.
• Contribute to a positive, collaborative, and solutions‑oriented team culture.

• Minimum of 5 years’ administrative or executive assistant experience with increasing responsibility, preferably in a professional services or corporate environment; experience supporting public accounting professionals is a plus.
• High proficiency with Microsoft Office Suite (Outlook, Word, Excel, PowerPoint); experience with expense and travel management systems is a plus.
• Strong organization, time management, multitasking, and prioritization skills.
• Ability to work effectively in a fast‑paced, dynamic environment and adapt to shifting priorities; willingness to work extended hours when necessary.
• Proven ability to handle sensitive information by exercising discretion with confidential information.
• Excellent verbal and written communication skills; including strong business and professional writing, editing, and proofreading capabilities.
• Availability to work extended hours when necessary.
• Due to the nature of the role, this position requires full‑time, on‑site presence at our Boston, MA location.

• High School Diploma or GED
• 3 years relevant work experience in an office environment and preferably performing as an administrative assistant
• Proficient use of applicable technology
• Advanced computer skills in Word, Excel, PowerPoint, and Outlook
• Ability to manage multiple projects and deliverables simultaneously
• Excellent written/verbal communication skills and use of grammar
• Excellent organizational skills and attention to detail
• Ability to adapt to a changing environment
• Ability to follow standard procedures
• Ability to work cooperatively with others
• Ability to build relationships and trust with internal and external clients and other key stakeholders

CBIZ Inc. is a leading professional services advisor to middle‑market businesses and organizations nationwide. With unmatched industry knowledge and expertise in accounting, tax, advisory, benefits, insurance, and technology, CBIZ delivers forward‑thinking insights and actionable solutions to help clients anticipate what’s next and discover new ways to accelerate growth. CBIZ has more than 10,000 team members across more than 160 locations in 22 major markets coast to coast.

CBIZ strives to be our team members’ employer of choice by creating an environment where team members are appreciated, recognized for their contributions, and provided with opportunities to grow, both personally and professionally, throughout their careers.

Together, CBIZ and CBIZ CPAs are ranked as one of the top providers of accounting services in the United States. CBIZ CPAs is an independent CPA firm that provides audit, review and attest services, while CBIZ provides business consulting, tax and financial services. In certain jurisdictions, CBIZ CPAs operates under its previous name, Mayer Hoffman McCann P.C.