Associate Director, Finance Systems - IT

A Rare Opportunity to Shape the Future of Genomics Join a team of brilliant, passionate innovators determined to transform healthcare. At BillionToOne, we've built a category-defining, publicly traded company on Nasdaq where transparency fuels trust, collaboration drives breakthroughs, and every contribution moves the needle on our mission to make life-changing diagnostics accessible to all. We don't just aim for incremental improvements; we build products that are 10x better than anything that exists today. Our scientists, engineers, sales executives, and visionaries are united by an unwavering commitment to changing the standard of care in prenatal and cancer diagnostics. This is where cutting-edge science meets human compassion, and every innovation you contribute helps remove the fear of the unknown from some of life's most critical medical moments. If you're driven by purpose, energized by innovation, and ready to help shape the future of precision medicine at scale, this is where you belong. BillionToOne is seeking an Associate Director of Finance Systems - IT to serve as the strategic and operational leader for all financial technology platforms across our organization. This is a senior individual contributor and people-leadership role that sits at the intersection of finance, compliance, and technology—responsible for ensuring our systems infrastructure is scalable, audit-ready, and aligned with the demands of a public company operating under SOX Section 404(b). You will lead a team and act as the primary owner of our financial systems strategy, partnering closely with Accounting, Legal, HR, Billing, and IT to design and maintain a controlled environment that meets Big 4 audit scrutiny. Your deep experience with 404(b) compliance, ERP administration, and cross-functional system integrations will be foundational as BillionToOne continues to scale as a public company. Responsibilities: SOX 404(b) Compliance & Internal Controls Administerand maintain the company's IT General Controls (ITGCs) across in scope financial systems, implementing the ITGC framework, including logical access, change management, and computer operations controls across all in-scope financial systems. Lead all systems-related workstreams in support of the annual SOX 404(b) audit, coordinating directly with external auditors . Design and maintain control documentation, including risk and control matrices, narratives, and process flowcharts for all financially relevant systems. Implement remediation actions for IT control gaps and deficiencies as identified and directed by internal audit, and support internal audit's pre-fieldwork readiness process.. Support continuous improvement initiatives within the IT controls environment, escalating proposed changes to finance and accounting leadership for approval. ERP & Financial Systems Strategy Serve as the senior system owner for NetSuite, overseeing system architecture, configurations, workflows, roles, permissions, and release management. Define and execute the multi-year financial systems roadmap, identifying technology investments that support scalability, compliance, and operational efficiency. Oversee evaluation, selection, and implementation of new financial technology platforms including revenue management, payment systems, FP&A tools, and HRIS integrations. Establish and enforce change management policies, including change request processes, UAT protocols, and go-live approval gates. Drive automation and process optimization initiatives across the finance and supply chain systems landscape. Cross-Functional Leadership & Stakeholder Partnership Act as the strategic liaison between Finance, Accounting, HR, Legal and IT, ensuring system design and project delivery align with operational needs and compliance requirements. Lead and mentor a team of Finance Systems analysts and administrators, setting clear goals, priorities, and professional development plans. Develop and maintain executive-level reporti