Sr. SAP Tax & Vertex Engineer

If you’re interested in this role, please apply in English and include an English version of your Resume/CV.   The Role: Joining Moderna means advancing mRNA science to transform medicine. Work with exceptional global teams on a broad pipeline and build a career that makes a real difference for patients. Moderna is strengthening its international business services hub in Warsaw, supporting our growing global operations. We welcome professionals ready to help advance our mission and shape the future of mRNA medicines. As a senior technical expert within Moderna’s enterprise technology organization, you will play a critical role in shaping and supporting the global tax technology landscape across SAP S/4HANA. This position combines deep SAP tax expertise with advanced Vertex capabilities to deliver scalable, compliant, and efficient tax solutions that support Moderna’s rapidly expanding global operations. Working across global business functions, you will serve as the trusted authority for tax determination, compliance, reporting, and integration, ensuring tax processes are seamlessly embedded across finance and supply chain operations. You will partner closely with Tax, Finance, Digital, and business stakeholders to translate evolving regulatory requirements into robust system solutions while driving innovation through automation, AI-enabled capabilities, and modern digital technologies. Here's What You'll Do: Serve as the SAP and Vertex Subject Matter Expert (SME) for global tax processes across Moderna’s enterprise landscape. Design, configure, support, and optimize SAP tax procedures, condition techniques, tax codes, and tax determination logic within SAP S/4HANA. Design, implement, and maintain Vertex O-Series integrations, ensuring accurate tax calculation, jurisdiction determination, and reporting consistency. Support global indirect tax requirements including: US Sales & Use Tax European Union VAT APAC GST Regional tax compliance models and statutory requirements Support direct tax and withholding tax processes, including integration with finance processes and reporting structures. Ensure seamless tax integration across key business processes including: Order-to-Cash (O2C) Procure-to-Pay (P2P) Source-to-Pay (STP) Record-to-Report (RTR) Billing Procurement Intercompany transactions General Ledger postings Support and enhance SAP Document & Reporting Compliance (DRC) solutions and Continuous Transaction Controls (CTC) capabilities. Collaborate with global tax teams to interpret regulatory requirements and translate them into scalable system configurations and technical solutions. Support and maintain tax-relevant master data, including customer, vendor, material, and tax classification data structures. Drive accurate tax reporting and reconciliation leveraging SAP DRC, Vertex solutions, and business intelligence platforms. Lead and support testing activities across UNIT, SIT, and UAT cycles, ensuring successful deployments and ongoing production support. Drive process automation and operational efficiency through OCR, RPA, advanced analytics, and emerging Generative AI and AI-enabled capabilities. Ensure strong governance through SOX compliance, audit readiness, controls management, and comprehensive process documentation. Act as a hands-on technical expert, troubleshooting complex tax configuration, integration, and compliance challenges across global regions. Support a global tax technology footprint spanning the United States, Europe, and APAC, enabling scalable growth and regulatory compliance across Moderna’s international operations. The key Moderna Mindsets you’ll need to succeed in the role: We obsess over learning. We don’t have to be the smartest, we have to learn the fastest. We digitize everywhere possible using the power of code to maximize our impact on patients. Here’s What You’ll Need (Basic Qualifications) Bachelor’s degree in Finance, IT, or related field 7+ years SAP experience with strong focus on tax Hands-on experience with SAP S/4HANA tax configuration and FI module Strong experience with Vertex O-Series tax engine and Vertex certificate center Deep understanding of indirect tax (Sales & Use Tax, VAT, GST) Experience supporting withholding tax and direct tax integration Here’s What You’ll Bring to the Table (Preferred Qualifications) Experience with SAP DRC (Document & Reporting Compliance) Global e-invoicing and statutory reporting experience Experience across multiple regions (US, EU, APAC tax models) Experience with SAP BTP and integrations Experience in life sciences or regulated industries Strong analytical and problem-solving skills Pay & Benefits At Moderna, we believe that when you feel your best, you can do your best work.   That’s why our benefits and well-being resources are designed to support you—at work, at home, and everywhere in between. Competitive healthcare, plus voluntary benefit programs to support your unique needs A holistic approach to well-being with access to fitness, mindfulness, and mental health support Family building benefits, including fertility, adoption, and surrogacy support Generous paid time off, including vacation, bank holidays, volunteer days, sabbatical, global recharge days, and a discretionary year-end shutdown Savings and investments to help you plan for the future Location-specific perks and extras The benefits offered may vary depending on the nature of your employment with Moderna and the country where you work. About Moderna Since our founding in 2010, we have aspired to build the leading mRNA technology platform, the infrastructure to reimagine how medicines are created and delivered, and a world-class team. We believe in giving our people a platform to change medicine and an opportunity to change the world.   By living our mission, values, and mindsets every day, our people are the driving force beh