Accounts Receivable Specialist

Position: Accounts Receivable Specialist

Salary Range: $75,000-$80,000

Location: Waltham, MA

Hybrid: 3 days in office/2 days from home

Pharmaron is a global contract research and manufacturing organization (CRO/CDMO) helping pharma and biotech companies bring new therapies to life. With over 25,000 employees worldwide across 28 locations in the US, UK, China, and Singapore, we support drug discovery through to manufacturing with fully integrated high-quality services.

We're proud of the impact we make and just last year, we supported 887 discovery projects
, 1,100+ CMC programs
, and 1,397 clinical trials across all phases. Our teams are involved in everything from small molecules, ADC's, biologics, and gene therapies and we work with more than 3,300 global customers
. To learn more, visit

Are you an experienced Accounts Receivable professional who enjoys solving problems, building customer relationships, and improving cash flow? We're looking for an Accounts Receivable Specialist to join our growing finance team and play a key role in managing customer accounts, driving collections, and ensuring timely payment of outstanding invoices.

This is an excellent opportunity for a detail-oriented professional who thrives in a collaborative, fast-paced environment and has experience supporting life sciences, pharmaceutical, biotechnology, contract research, or professional services.

As an Accounts Receivable Specialist, you'll be responsible for managing a portfolio of customer accounts while partnering with internal teams and customers to resolve payment issues and improve collection performance. Your responsibilities will include:

• Manage and monitor assigned customer accounts to ensure timely collection of outstanding balances.
• Review aging reports and prioritize collection efforts based on account risk and delinquency.
• Contact customers via phone and email to secure payment commitments and resolve overdue invoices.
• Investigate and resolve payment discrepancies, billing disputes, unapplied cash, short payments, and account reconciliation issues.
• Maintain accurate collection documentation and account records within ERP systems.
• Collaborate with Billing, Business Development, and internal stakeholders to resolve issues affecting customer payments.
• Respond promptly to customer inquiries regarding invoices, payment history, account balances, and remittance information.
• Prepare account statements, payment reminders, collection notices, and related correspondence.
• Identify high-risk or delinquent accounts and recommend appropriate collection strategies, including payment plans, account holds, or escalation when necessary.
• Ensure compliance with company policies, internal controls, and established accounts receivable procedures.

• Associate's or Bachelor's degree in Accounting, Finance, Business Administration, or a related field preferred.
• Three or more years of Accounts Receivable and commercial collections experience.
• Experience supporting organizations within contract research (CRO), life sciences, biotechnology, pharmaceutical, healthcare, or professional services environments preferred.
• Strong understanding of accounts receivable processes, collections practices, and account reconciliation.
• Experience using ERP systems and Microsoft Excel.
• Excellent communication, customer service, and negotiation skills.
• Strong analytical, organizational, and problem-solving abilities.
• Ability to prioritize multiple tasks and meet deadlines in a dynamic environment.

• Customer-focused with exceptional relationship-building skills.
• Persistent, professional, and confident when managing collections.
• Detail-oriented with strong organizational skills.
• Analytical and solution-oriented.
• Able to balance customer service with sound financial judgment.
• Collaborative and comfortable working across multiple departments.
• Self-motivated with a strong sense of accountability and ownership.

Pharmaron is a premier service provider for the life sciences industry. Founded in 2004, Pharmaron has invested in its people and facilities and established a broad spectrum of research, development, and manufacturing service capabilities throughout the entire drug discovery, preclinical, and clinical development process across multiple therapeutic modalities, including small molecules, biologics, and CGT products. With over 25,000 employees and operations in the US, UK, China, and Singapore.

Pharmaron has an excellent track record in delivering R&D solutions to its partners in North America, Europe, Japan, and China.

You will thrive in our inclusive and collaborative environment, where teamwork and innovation go hand in hand. Here, your voice matters, and your contributions make a real impact. "Employees Number One" and "Clients Centered" are the core cultural values  culture, which sets Pharmaron apart from other organizations, has evolved from our…