AR Billing Specialist

Company Overview

Since 2002, Mason Technologies has been a leader in technology integration, proudly certified as a Woman-owned Business Enterprise (WBE) both in NYC and nationally. With headquarters and a fully equipped warehouse in Deer Park, NY, an additional office in downtown NYC, and resources across the nation, we design, implement, and service innovative solutions in low-voltage structured cabling, audio visual systems, data centers, and unified security. We serve a variety of industries including healthcare, government, higher education, finance, and business (both big and small).

Our founder, Jennifer Mason, has cultivated a family-like environment that emphasizes deep care and commitment to our people and the clients and communities we serve. At Mason Technologies, diversity and inclusion drive our hiring, ensuring we bring together the most talented individuals regardless of race, age, religion, gender identification, or sexual orientation.

Position Overview

We are seeking a detail-oriented, dependable, and professional Billing Specialist to join our growing team. This blended role combines project-based billing responsibilities with client-facing collections. 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 collections process. Our work heavily involves municipal and government contracts, requiring a thoughtful, professional, and relationship-driven approach.

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

Requirements

• 2+ 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 on a regular basis
• Ability to manage multiple projects, accounts, and deadlines simultaneously
• High school diploma required; Associate’s degree or higher preferred

Benefits

• Medical, Dental, and Vision Coverage: Comprehensive healthcare benefits to keep you and your family healthy and secure
• 401k with Matching: Plan for your future with our 401k program, featuring competitive company matching
• Paid Time Off (Holiday/Vacation/Sick/Personal): Generous PTO to ensure a healthy work-life balance
• Unlimited Growth Opportunities: Continuous professional growth and development
• Family-Friendly Company Events & Outings: Regular events and outings to foster team camaraderie, like Warehouse Jam Sessions and Holiday Parties
• Bagel Thursdays & Tuesday Lunch Catering: Weekly treats with Bagel Thursdays and Tuesday Lunch catering at our offices
• Caring Ownership: Mutual dedication with a supportive and caring work environment

Pay

$70,000.00 - $80,000.00 per year

Schedule

Full-time, In-Person

We are currently only considering candidates who already live within commuting distance of our office. This role is not open to relocation and relocation assistance is not provided.