Project Billing Specialist — Growth & Client Relations

Mason Technologies Inc.; Deer Park (NY); On-site; USD 70,000 - 80,000; Full time

Benefits offered by this job

Medical coverage

401k matching

Paid time off

Growth opportunities

Team events

Job summary

Mason Technologies is seeking a detail-oriented Billing Specialist to join our Deer Park team. You will manage project-based invoicing, progress billing, and collection efforts while upholding contract requirements and strong client relationships.

Ideal candidates have 2+ years in accounts receivable, billing, or collections, experience with project-based billing, and proficiency in ERP systems and Excel. This role emphasizes accuracy, professional communication, and collaboration across

Qualifications

• 2+ years of experience in accounts receivable, billing, or collections.
• Experience with project-based billing (progress billing, change orders, etc.).
• Proficiency in accounting/ERP systems and Microsoft Excel.

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
• Fostering an inclusive work culture that incorporates the Mason Family values

Skills

Accounts receivable

Billing

Customer communication

Education

High school diploma

Associate’s degree or higher preferred

Tools

ERP systems

Microsoft Excel

Job description

Mason Technologies is seeking a detail-oriented Billing Specialist to join our Deer Park team. You will manage project-based invoicing, progress billing, and collection efforts while upholding contract requirements and strong client relationships.

Ideal candidates have 2+ years in accounts receivable, billing, or collections, experience with project-based billing, and proficiency in ERP systems and Excel. This role emphasizes accuracy, professional communication, and collaboration across