Billing Specialist

BILLING SPECIALIST Part Time · Location: Stamford, CT, US Over the past 25 years, Waste Harmonics Keter has been at the forefront of the waste and recycling industry, delivering innovative, data-driven solutions. We help companies right-size their waste operations and get out of the waste business with industry-leading expertise, advanced waste technologies, and exceptional customer service. The Part-Time Billing Specialist plays a critical role in supporting the accuracy, timeliness, and integrity of customer billing operations. This position is responsible for generating invoices, reconciling discrepancies, maintaining billing records, and supporting operational and financial accuracy across multiple systems and data sources. This role is ideal for a highly organized and resourceful professional who thrives in a fast-paced environment, enjoys problem-solving, and can navigate ambiguity while maintaining a high level of attention to detail. The Billing Specialist will work closely with internal stakeholders to ensure billing accuracy and support continuous process improvement initiatives. Key Responsibilities Billing & Invoice Management • Generate, review, and distribute customer invoices accurately and timely  • Reconcile billing discrepancies by reviewing spreadsheets, operational records, emails, and supporting documentation  • Validate billing data across multiple systems and sources to ensure accuracy  • Maintain organized billing records and supporting documentation  • Assist with aging reports, invoice tracking, and billing follow-up activities    Operational Support • Build and maintain Excel-based reporting and tracking tools to support billing workflows  • Utilize formulas, pivot tables, lookups, and data validation functions to improve efficiency and accuracy  • Collaborate with internal departments to gather information needed to resolve billing issues  • Support continuous improvement initiatives by identifying process gaps and recommending operational enhancements  • Adapt to shifting priorities and support a high-volume operational environment with urgency and accountability    Cross-Functional Collaboration • Communicate professionally with internal teams regarding invoice questions, disputes, and data clarification  • Partner with Finance and Operations teams to ensure billing consistency and alignment  • Contribute to a positive, collaborative team environment while supporting shared departmental goals  Required Qualifications • Intermediate to advanced Microsoft Excel skills, including:  • Pivot Tables  • VLOOKUP/XLOOKUP  • IF Statements  • Data cleanup and reconciliation  • Strong attention to detail and analytical problem-solving skills  • Ability to manage multiple priorities in a fast-paced environment  • Demonstrated ability to work independently and remain organized with minimal oversight  • Strong written and verbal communication skills  • Ability to navigate ambiguity and identify practical solutions proactively  Preferred Qualifications • Experience in billing, accounts receivable, finance operations, or related administrative functions  • Experience working in a fast-paced, operationally lean, or high-growth environment  • Familiarity with accounting or ERP platforms such as NetSuite, QuickBooks, Sage, or similar systems  • Experience within transportation, logistics, recycling, waste, or service-based industries preferred  Core Competencies • Customer Focus  • Ensures Accountability  • Action Oriented  • Manages Complexity  • Collaborates  • Communicates Effectively  • Continuous Improvement Mindset  • Problem Solving & Analytical Thinking At Waste Harmonics Keter, we celebrate diversity and are committed to creating an inclusive environment for all employees. We welcome candidates from all backgrounds to apply.