Office Manager​/Bookkeeper; Part Time

Office Manager / Bookkeeper (Part-Time)

Boston, MA or Chicago, IL

Part-time, 24-27 hours per week - hybrid, with two in-office days

Non-exempt / Hourly

Tire One Partners is seeking a proactive and detail-oriented Office Manager/Bookkeeper to support our Boston, Chicago, and New York offices on a part-time basis (24-27 hours per week). This person can be based in either our Boston or Chicago office.

You’ll play a key operational role at a nationally recognized, award-winning integrated marketing agency – partnering closely with senior leadership, to keep the business running smoothly and help shape a positive culture across Tier One's Boston, Chicago, and New York offices.

This is a hands‑on, agency support role combining bookkeeping and finance administration, light HR support, and office management.

• AR, AP, and reconciliations (bank and credit card accounts) in Quick Books Online
• Payroll entry, deductions, and review with Alcott HR/iSolved (PEO firm)
• Process 401(k) contributions, including journal entries, and manage relationships with the 401(k) provider and third‑party administrator
• Support monthly and year‑end reporting in partnership with our external accounting firm
• Monthly client invoicing; contract management and organization; track client billable expenses; follow up with clients on overdue receivables
• Manage employee credit cards and reimbursements; bill pay through
• Prepare financial reports as requested (payroll, expenses, AR, AP)
• Maintain a strong understanding of Tier One's expenses and proactively identify opportunities to cut costs
• Maintain a strong understanding of employee utilization and forecast vs. actual hours; report and monitor for the Senior Leadership Team

• Provide light HR administrative support with Alcott HR, including maintaining the Employee Handbook, tracking and updating pay changes, and collecting/e‑filing employee paperwork
• Manage the employee on‑ and off‑boarding process
• Follow and manage the Operations Calendar for important dates and deadlines

• Maintain administrative recordkeeping and e‑filing (using Google Drive folders and sites)
• Coordinate with Tier One's managed IT provider, Miles IT, on employee onboarding and offboarding; manage agency's laptop inventory
• Maintain a strong understanding of Tier One's technology partners (e.g., Cumulus Global, Miles IT) and the services they offer, including security
• Take a proactive approach to managing risk
• Identify opportunities to increase Tier One's use of AI to streamline finance and operations

• Financial Savvy: Solid financial management experience – someone capable of coordinating accounts payable/receivable, invoicing, and reporting while keeping senior leadership informed
• Systems Champion: Highly organized, detail‑oriented, and comfortable managing multiple deadlines
• Trusted Guardian: Absolute integrity; deeply trustworthy and discreet when handling sensitive payroll, HR documentation, and confidential financial information
• Solution Seeker: A proactive problem‑solver who takes initiative to optimize processes, manage vendor relationships (such as IT and payroll), and identify cost‑saving opportunities
• Tech‑Forward Operator: Curious about modern digital tools and AI applications, with an active interest in finding new ways to automate and streamline finance and operations
• Collaborative Connector: A natural relationship‑builder who fosters a positive agency culture across offices, facilitating smooth communication between employees, senior leadership, and external partners.

• 2+ years of bookkeeping, accounting, or office management experience; agency or professional services experience a plus
• Proficiency with Quick Books Online required; experience with Ramp, payroll/HRIS platforms (e.g., iSolved), and Google Workspace preferred
• Experience with payroll processing, 401(k) administration, and basic HR administrative functions

The expected salary for this role is $40, annually, and may vary based on experience and qualifications.

In addition to base salary, Tier One offers a competitive…