Bookkeeper for Mahwah NJ IT Company (In-Office)

Bookkeeper Position

Delaney Computer Services (DCS) is a Northern New Jersey–based Managed IT Services Provider serving small and mid-sized businesses throughout the New York Metro area. We deliver managed IT, cybersecurity, cloud, and professional services to clients who depend on us to keep their businesses operational and secure.

We are seeking a detail-oriented Bookkeeper to join our team and support our financial and billing operations. This is an opportunity to join a stable, growing company where accuracy, organization, and accountability are highly valued.

This is an in-office position in Mahwah, NJ. Remote candidates will not be considered.

The Bookkeeper is responsible for maintaining accurate financial records, supporting invoicing and billing processes, and ensuring that financial data remains organized and up to date.

Our environment includes recurring services, project-based work, vendor expenses, and contract-based billing. While deep MSP experience is not required, the right candidate should be comfortable working in a structured, detail-driven environment and able to understand how billing aligns with services and agreements.

You will also assist with internal coordination and may communicate with clients when questions arise, so professionalism and clarity are important.

Core responsibilities include managing and processing monthly recurring service agreement (MSA) billing, invoicing project-based and transactional work (hardware, software, renewals, domains, etc.), reconciling vendor invoices and licensing to client agreements, maintaining billing accuracy within QuickBooks Online, auditing contracts and ensuring billing aligns with contract terms, resolving billing discrepancies proactively, communicating directly with clients regarding invoice questions, service relationships, and contract terms, identifying when issues require escalation to management and when they can be handled independently, and continuously improving billing processes and documentation.

What we are looking for includes someone who is organized, detail-oriented, and reliable, comfortable working in a structured, professional environment, able to manage multiple tasks and stay on top of priorities, a clear communicator who can work with internal staff and, when needed, clients, and someone who takes ownership of their work and follows through. This is not a passive administrative role. It requires ownership, judgment, and professionalism.