Part-Time Accounting Assistant

J. Morrissey & Company; Manchester (CT); On-site; USD 30,000 - 39,000; Part time

Job summary

J. Morrissey & Company in Manchester is seeking a Part-Time Accounting Assistant to support invoicing, payroll processing, and basic account management for the accounting department. This onsite role offers 20-25 hours per week with flexible scheduling.

You will generate and review monthly invoices, reconcile contracts, process payroll, and serve as a point of contact for clients on billing matters. Previous MSP or services experience and QuickBooks familiarity are a plus.

Qualifications

• 3+ years of accounting support experience.
• Experience using QuickBooks is a plus.
• Experience working for an MSP, services provider, or similar technical service organization.
• Experience processing payroll.
• Attention to detail with the ability to spot billing discrepancies and communicate clearly with clients.

Responsibilities

• Generate and review recurring monthly managed-service invoices, verifying accurate billing of contracts, devices, users, and licenses.
• Reconcile contracts against vendor invoices and actual service quantities.
• Process billing changes tied to staffing, device, licensing, or service-level updates, plus project, hardware, labor, and travel charges.
• Track project payments and deposits, monitor vendor price changes, and maintain contract and renewal documentation.
• Flag missed billing, discrepancies, or margin issues, and support management on client profitability reviews.
• Act as a primary billing and administrative point of contact for assigned clients.
• Field client questions on invoices, contracts, services, and account balances.
• Coordinate across service, sales, and project teams to resolve account issues, and support client onboarding/offboarding.

Skills

Invoicing

Payroll processing

Contract administration

Client communication

MSP experience

Tools

QuickBooks

Job description

About the Opportunity

Our client, a managed service provider, is looking for a Part-TIme Accounting Assistant to support the accounting department. This role is focused specifically on invoicing and payroll processing and some account management. The ideal candidate is comfortable with processing invoices and working with external clients and processing a small payroll. Hours can be flexible but will be 20 - 25/week. This is a fully onsite position in Manchester.

What You’ll Do

Billing & Contract Administration

• Generate and review recurring monthly managed-service invoices, verifying accurate billing of contracts, devices, users, and licenses
• Reconcile contracts against vendor invoices and actual service quantities
• Process billing changes tied to staffing, device, licensing, or service-level updates, plus project, hardware, labor, and travel charges
• Track project payments and deposits, monitor vendor price changes, and maintain contract and renewal documentation
• Flag missed billing, discrepancies, or margin issues, and support management on client profitability reviews

Client Account Management

• Act as a primary billing and administrative point of contact for assigned clients
• Field client questions on invoices, contracts, services, and account balances
• Coordinate across service, sales, and project teams to resolve account issues, and support client onboarding/offboarding

What You Bring

• 3+ years of accounting support experience
• Experience using QuickBooks a plus
• Experience working for an MSP, services provider, or similar technical service organization
• Experience processing payroll
• Sharp attention to detail with the ability to spot billing or accounting discrepancies
• Excellent written and verbal communication, including with clients on sensitive billing matters INDA