Office Manager / Bookkeeper (Part Time)

Tier One Partners; Boston (MA); Hybrid; USD 40,000 - 48,000; Part time

Benefits offered by this job

401(k) Safe Harbor

Paid time off

Hybrid work

Professional development

Job summary

Tier One Partners is seeking a part-time Office Manager/Bookkeeper to support our Boston, Chicago, and New York offices. The role combines bookkeeping, finance administration, light HR support, and office management in a hybrid work setting.

You will handle AR/AP, payroll input, 401(k) admin, monthly/year-end reporting, invoicing, vendor management, and cost-control efforts while partnering with senior leadership to keep operations running smoothly.

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

Responsibilities

• 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

Skills

Bookkeeping

Accounting

Office management

QuickBooks Online

Ramp

iSolved

Google Workspace

Payroll processing

401(k) administration

HR administration

Tools

Ramp

iSolved

Google Workspace

Job description

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

• 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: