Senior Clinical Research Finance Specialist

Iterative Health is a healthcare technology and services company powering the acceleration of clinical research to transform patient outcomes. We built a leading performance-driven network of 100+ sites across the US, Europe, India, and Australia, conducting research directly in the communities where care is delivered across gastrointestinal, hepatology, obesity, and cardiology. By combining deep clinical trial expertise with cutting-edge AI, we connect sponsors' scientific ambitions with high-performing research teams that expedite and expand access to novel therapeutics for patients in need. Today, Iterative Health is headquartered in Cambridge, Massachusetts, and New York City with 250+ employees world-wide. The Senior Clinical Research Finance Specialist is a critical member of Iterative Health's growing Finance team, partnering closely with the Research Finance Manager to own end-to-end accounts receivable operations across sponsor-funded clinical studies and internal research sites. This role sits at the intersection of finance and clinical research — ensuring accurate billing, timely cash application, and prompt resolution of outstanding balances across a complex, multi-site research environment. The ideal candidate is a detail-driven finance professional who thrives on balancing hands-on execution with cross-functional collaboration and is energized by finding smarter, more efficient ways to get the work done. Where You’ll Drive Impact Own day-to-day AR operations for sponsor-funded studies and internal sites, ensuring accurate tracking of balances and timely collections. Monitor and reconcile study-level balances and payment activity, proactively identifying discrepancies and driving resolution with internal and external stakeholders. Accurately post cash receipts and payment details in RealTime CTMS and related financial systems. Prepare and issue invoices for study activities and services in coordination with sponsor communications and internal teams. Analyze AR aging and payment trends, escalating risks and recommending actions to improve collections and cash flow. Serve as a key point of contact for sponsors and CROs regarding billing inquiries, payment status, and outstanding balances. Collaborate cross-functionally with Clinical Operations, Site Finance, and Accounting teams to clarify billing terms, milestone triggers, and contract deliverables. Prepare AR aging schedules, financial summaries, and operational reports for finance leadership. Support internal audits, financial reviews, and documentation related to accounts receivable and billing activities. Identify opportunities to improve AR workflows, reporting, and system utilization to increase efficiency and financial transparency. Contribute to finance process documentation and help implement best practices across the organization. Performs related duties as requested Bachelor's degree in Finance, Accounting, Business, or a related field; or equivalent practical experience. 3–5+ years of experience in accounts receivable, billing operations, or finance within a complex or multi-entity environment. Strong proficiency in Microsoft Excel, including data analysis, reconciliation, and financial reporting. Demonstrated ability to manage multiple priorities while maintaining strong attention to detail and accuracy. Strong written and verbal communication skills, with the ability to work effectively with internal stakeholders and external partners including sponsors and CROs. Proven ability to independently manage operational finance processes and resolve issues proactively. Preferred Qualifications Experience with RealTime CTMS or similar clinical trial management and billing systems. Background in healthcare, clinical research, or clinical trial finance. Familiarity with clinical trial billing structures, sponsor contracts, and study-level financial reconciliation. Experience working in high-growth or multi-site organizations. How We Work Collaborative and low-…