About this opportunity
Co-Source Solutions lists this Associate Project Accountant opportunity in suffolk county, New York. Review the employer’s description below for duties, qualifications and application requirements.
Job description
Our Long Island, New York - based client is seeking a detail-oriented Associate Project Accountant /Billing Associate to join their team. The ideal candidate will be equally comfortable preparing accurate, contract-compliant invoices and proactively communicating with clients to ensure timely payment. This role requires a strong understanding of project-based billing (including progress billing, change orders, and compliance requirements) along with the ability to build positive, long-term relationships with customers during the follow-up process.
Responsibilities
Prepare, review, and issue project-based invoices, including progress billing, milestone billing, and approved change orders
Ensure all billing aligns with contract terms, job progress, and supporting documentation
Coordinate with Project Managers, Operations, and Accounting to validate billing accuracy
Maintain accurate and organized billing records within the accounting/ERP system
Assist with certified payroll reporting, including prevailing wage and union-related requirements
Support compliance with union agreements, job cost tracking, and audit requirements
Conduct proactive outreach via phone and email to follow up on outstanding invoices
Build and maintain strong relationships with customers, AP contacts, and municipal clients
Monitor AR aging reports and consistently follow up on overdue accounts
Investigate and resolve billing discrepancies in a timely and professional manner
Maintain detailed records of client interactions and collection efforts
Generate billing, AR aging, and collections reports for management review
Assist with month-end close processes related to billing
Collaborate across departments to improve billing accuracy and cash flow efficiency
Qualifications
3+ years of experience in accounts receivable, billing, or collections
Strong preference for experience in construction, low-voltage, electrical, HVAC, or similar project-based industries
Experience with project-based billing (progress billing, change orders, etc.)
Certified payroll and prevailing wage experience highly preferred
Familiarity with union jobs and job cost tracking preferred
Proficiency in accounting/ERP systems and Microsoft Excel
Strong attention to detail and organizational skills
Excellent communication skills—professional, clear, and relationship-focused
Comfortable handling client communication via phone regularly
Ability to manage multiple projects, accounts, and deadlines simultaneously
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.