Office Manager / Bookkeeper

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

The Opportunity

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.

Key Responsibilities

Bookkeeping & Payroll

• AR, AP, and reconciliations (bank and credit card accounts) in QuickBooks 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 Ramp.com
• 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

HR Administration

• 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

Office Management/Technology

• 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

What We're Looking For

• 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.

Qualifications

• 2+ years of bookkeeping, accounting, or office management experience; agency or professional services experience a plus
• Proficiency with QuickBooks 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

Your Pay and Benefits

The expected salary for this role is $40,000-48,000 annually, and may vary based on experience and qualifications.

In addition to base salary, Tier One offers a competitive benefits package, including:

• 401(k) with a 3% Safe Harbor contribution
• Paid time off
• Hybrid work flexibility; we offer flexible scheduling options to accommodate various personal commitments and caregiving responsibilities.
• Opportunities for professional development and career growth.

How You Will Succeed

• Timely, accurate bookkeeping, reconciliations, payroll, and invoicing with minimal errors
• On-time monthly and year-end financial reporting
• Smooth, well-documented onboarding/offboarding and HR administrative processes
• Proactive identification of risks, cost savings, and process/automation improvements

Who We Are

Tier One Partners is an independent, integrated marketing agency with more than two decades of experience helping high-growth companies lead through disruption. We specialize in PR, content, and digital marketing for organizations operating in complex, high-stakes industries including technology, financial services, digital health, and energy tech.

We are proud to be recognized by PRovoke Media as:

• One of the 100 Best Agencies in the US
• A Top 40 Technology Agency globally
• A 20 Best US Agencies to Work For