General Ledger Senior Accountant

The Role:
Joining Moderna offers the unique opportunity to be part of a pioneering team that's revolutionizing medicine through mRNA technology, with a diverse pipeline of development programs across various diseases.

As an employee, you'll be part of a continually growing organization, working alongside exceptional colleagues and strategic partners worldwide, contributing to global health initiatives.

Moderna's commitment to advancing the technological frontier of mRNA medicines ensures a challenging and rewarding career experience, with the potential to make a significant impact on patients' lives worldwide.

Moderna is solidifying its presence within our international business services hub in Warsaw, Poland, a city renowned for its rich scientific and technological heritage. This hub provides critical functions, meeting the growing demand of Moderna’s global business operations. We're inviting professionals from around the world to join our mission and contribute to the future of mRNA medicines.

As a Senior Accountant within the General Ledger (GL) team, you will play a vital part in Moderna’s international accounting operations, ensuring timely, accurate close submissions and supporting compliance with US GAAP and local statutory requirements. Reporting to the General Accounting Manager, your work will have direct impact on the delivery of high-quality financial reporting and enable broader organizational growth. This is a highly visible, hands-on role where your contributions will support legal entities across our global footprint. You’ll bring a sharp eye for process improvements, a readiness to challenge convention, and the ability to thrive in a fast-paced, rapidly scaling environment. This role also provides a unique opportunity to collaborate across multiple geographies and functions while helping shape the backbone of Moderna’s financial infrastructure. The successful candidate will exemplify integrity, operational excellence, and a passion for continuous learning. This position also offers exposure to cutting-edge digital tools and systems — including opportunities to engage with Generative AI-based process enhancements — making it an exciting space for professionals passionate about the future of finance.

Here’s What You’ll Do:

Your key responsibilities will be:

• Executing accurate and timely monthly and quarterly close activities for assigned international legal entities

• Preparing key journal entries including payroll, accruals, and prepaids with a high degree of precision

• Managing Fixed Asset accounting and ensuring completeness of asset records

• Performing balance sheet account reconciliations and in-depth variance analysis

• Maintaining and reconciling US GAAP and local statutory records, including identification of local adjustments

• Contributing to the continuous improvement of financial close processes to support SEC filing timelines

• Supporting external financial audits and SOX 404 control testing with robust documentation

• Ensuring all close-related internal controls are performed, evidenced, and meet compliance standards

Your responsibilities will also include:

• Partnering closely with US Accounting, Country Finance Leads, and FP&A teams to ensure accurate recording of transactions and accruals

• Providing strong support to the preparation of statutory financial statements across international legal entities

• Assisting in the implementation and optimization of accounting systems and digital tools

• Offering subject matter expertise in process and policy discussions, influencing improvements and automation initiatives

• Contributing to the enhancement of accounting-related systems with a focus on scalability and efficiency

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.”
  In this role, you will operate in a dynamic and fast-evolving environment, constantly engaging with new systems, tools, and financial frameworks. A learning-driven mindset will be essential to stay ahead of change and add immediate value.

• “We digitize everywhere possible using the power of code to maximize our impact on patients.”
  As we embrace advanced technologies and digital finance tools — includ