Billing Specialist

Fractional Billing & Accounts Receivable (AR) Operations Specialist [$75-$100/hr]

Experienced billing and accounts receivable professional with a background in professional services environments (consulting, legal, advisory, or similar) to bring structure, accuracy, and operational rigour to client billing, collections, and revenue tracking processes.

• Own end-to-end client invoicing cycles, including time-and-materials, milestone-based, and retainer billing structures
• Ensure accurate tracking of billable hours, project codes, and client-specific terms
• Partner with internal stakeholders (finance, operations, client leads) to validate invoice inputs
• Maintain clear documentation of billing policies and workflows

• Monitor outstanding invoices and proactively manage collections
• Lead professional, client-facing communication regarding billing inquiries and payment follow-ups
• Maintain AR aging reports and provide visibility into cash flow forecasts
• Identify patterns in payment delays and recommend process improvements

• Assess and improve billing systems, tools, and reporting workflows
• Implement scalable controls to support growth in client volume
• Support monthly revenue reconciliation and financial reporting
• Ensure compliance with contractual terms and internal financial controls

• 5+ years of experience in billing and AR operations
• Prior experience in professional services environments (consulting firms, law firms, advisory practices, or similar)
• Strong understanding of:
  • Time-based and project-based billing models
  • Revenue recognition fundamentals
  • AR aging and collections workflows
• Experience working with accounting platforms
• Excellent written communication skills for professional client correspondence
• High attention to detail and strong process discipline
• Ability to work independently in a fractional capacity

• Experience supporting venture-backed startups or high-growth technology companies
• Familiarity with SaaS or AI services billing structures
• Experience building billing processes from early-stage or scaling environments
• Background in financial reporting or FP&A collaboration