Senior Purchasing and Accounts Payable Associate

About Us We are developing potentially best-in-class therapies for patients living with severe autoimmune diseases. Our lead antibody, claseprubart (DNTH103), is purposefully engineered with extended half-life, improved potency, and high selectivity for only the active C1s complement protein that drives disease pathology – enabling less frequent and more convenient self-administered subcutaneous injections. Our second clinical candidate, DNTH212 is a first and potentially best in class, bifunctional inhibitor that targets clinically validated and complementary disease modifying mechanisms, Type 1 IFN suppression and B cell modulation – enabling potential for improved clinical outcomes and patient friendly convenient, self-administered subcutaneous injections. Our newest candidate, DNTH312, is an internally developed, investigational, first-in-class, next-generation bifunctional fusion protein combining claseprubart and TACI to target potent inhibition of aC1s and BAFF/APRIL. DNTH312 aims to be Phase 1 ready by year end 2027. To learn more, please visit www.dianthustx.com and follow us on LinkedIn. About the Role Dianthus Therapeutics is seeking a detail-oriented Senior Purchasing & Accounts Payable Associate to join our growing Finance organization. This role will take ownership of the Company’s purchase order process in NetSuite, maintain accurate purchasing records, monitor outstanding commitments, and provide support across accounts payable and financial close activities. Reporting to the Director, SEC Reporting and Technical Accounting, this person will work closely with Finance and cross-functional teams, this individual will help ensure purchasing and invoice activities are completed accurately, efficiently, and in accordance with Company policies and internal controls. The ideal candidate brings strong hands-on purchasing and accounts payable experience and can quickly operate independently while helping strengthen processes and controls as the organization grows. We are building a culture of individuals who hold our core principles at the center of our operations, with the goal to elevate the care of our patients’ lives. We are open to you working remotely. Key Responsibilities Create, process, and maintain purchase orders in NetSuite, ensuring accurate vendor information, coding, financial classifications, documentation, and approvals. Review purchase order requests for completeness and compliance with established purchasing policies and approval requirements. Process purchase order amendments, adjustments, and closures. Conduct monthly reviews of open purchase orders, identifying aged balances, inactive commitments, completed services, and other items requiring follow-up. Partner with department owners to confirm outstanding commitments and resolve discrepancies among purchase orders, invoices, and contractual balances. Support accounts payable activities, including invoice review, coding, purchase order matching, vendor onboarding, and payment preparation. Assist with monthly and quarterly close activities by identifying outstanding invoices, vendor accruals, and potential unrecorded liabilities. Maintain accurate purchasing and accounts payable records in support of internal controls and financial reporting. Identify opportunities to improve purchasing, invoice-processing, and related Finance procedures as the organizational complexity increase. Support additional accounting activities and special projects as needed. Experience Bachelor’s or associate degree in accounting, Finance, Business Administration, or a related field, or equivalent relevant experience. Demonstrated experience independently managing accounts payable and purchasing activities in a fast-paced, high-volume environment. Experience with purchase orders, invoice processing, vendor records, and related financial documentation. NetSuite experience strongly preferred. Strong attention to detail, organization, and follow-through. Ability to manage multiple priorities, meet deadlines, and work independently. Strong communication skills and the ability to collaborate effectively across functions. Proficiency with Microsoft Excel and other Microsoft Office applications.