Billing Manager

Gray Mar Environmental Services continues to expand its national footprint while remaining firmly grounded in the values that define who we are. We live by Respect, Integrity, Safe Work Practices, Excellence in Service, and a deep sense of Family
-a commitment we proudly call RISE through Caring
.

We specialize in environmental remediation, health and safety, hazardous materials management, waste disposal, and environmental emergency response. Through comprehensive and sustainable solutions, we help our clients and the communities we serve manage risk, maintain compliance, and protect the environment.
Safety is our top priority
, and we take pride in our highly skilled, dedicated team that works together to get the job done safely—every time.

At Gray Mar, every employee is seen, heard, and valued, not as a number, but as a member of our family. Our culture supports continuous learning, professional development, and long-term career growth. We offer a robust benefits package that includes wellness programs, a 401(k) with company matching, spending account options, and comprehensive medical, dental, and vision coverage. We also provide company-paid life and disability coverage (long and short-term), ensuring our employees are supported both in and out of the field.

Inclusion at Gray Mar is not just an initiative; it is fundamental to how we innovate and grow. We draw strength from diverse experiences and perspectives and foster an inclusive environment where every voice matters. As we continue to grow nationwide, we remain committed to delivering exceptional service to our customers while building a workplace where people feel safe, supported, and proud to belong.

The Billing Manager owns and leads Gray Mar’s billing function on a company-wide basis. Reporting to the Controller, this individual is accountable for the complete, end to end billing lifecycle across all offices, service lines, and revenue streams from contract and job setup through invoice generation, delivery, dispute resolution, and the handoff to collections. The Billing Manager serves as the process and system owner for billing within the Company’s ERP and as the central point of coordination between corporate finance and the field, driving accuracy, timeliness, standardization, and a faster, more consistent billing cadence.

As Gray Mar grows through add-on acquisitions, this role will help integrate acquired billing operations including the invoicing staff and processes that join through those transactions making it both a hands‑on ownership seat and a build-and-scale opportunity.

• Own the end-to-end billing process across all offices, locations, and service lines, serving as the single point of accountability for billing accuracy, completeness, and timeliness.
• Establish, document, and enforce standardized billing policies, procedures, and internal controls that scale across a multi‑location organization.
• Set and monitor billing calendars and turnaround standards so invoices are issued promptly and in accordance with contract terms.

• Control the full billing lifecycle — from upstream field data capture and customer/contract onboarding through rate and pricing setup, work‑order and project tracking, invoice preparation and review, delivery, and rebill/dispute management.
• Identify and eliminate billing gaps, leakage, and bottlenecks to reduce unbilled revenue and accelerate cash conversion.
• Partner with Accounts Receivable and Collections to ensure clean handoffs and resolve aged unbilled and disputed balances.

• Coordinate and support billing preparation at each local office, ensuring complete, accurate, and timely billing inputs from the field.
• Standardize billing practices across geographies while accommodating state‑, jurisdiction‑, and customer‑specific requirements (including multi‑state sales/use tax considerations).
• Serve as the primary liaison between corporate finance and the field, proactively resolving billing questions and disputes directly with offices, operations, and customers.

• Own the billing‑related…