Tax Accountant / Senior Tax Accountant

Celltrion is a leading biopharmaceutical company that specializes in research, development and manufacturing of innovative therapeutics. We are committed to delivering innovative and affordable medications to promote patients’ access to advanced therapies. We have been at the forefront of biotherapeutic development uncovering new ways of targeting the drivers of disease by creating next-generation biologics and small molecule products.

Celltrion Branchburg, LLC is a subsidiary of Celltrion USA, established in 2025 following Celltrion USA’s acquisition of Eli Lilly’s drug substance (DS) manufacturing facility located in Branchburg. By linking robust local manufacturing capabilities with an existing direct sales network, we aim to generate greater synergies across our operations. Looking ahead, we also anticipate expanding into the global contract manufacturing organization (CMO) sector.

Position Brand Description:

The Tax Accountant / Senior Tax Accountant is responsible for supporting all areas of tax compliance, reporting, and operational tax processes across the business. This role manages direct and indirect tax activities including income tax, federal tax, state and local tax, sales and use tax, payroll tax, property tax, and other business-related taxes as applicable. The position also supports fixed asset and capital project accounting, including review and approval coordination for capital projects, capitalization of assets, maintenance of fixed asset records, and preparation of depreciation schedules and related reporting. This individual will partner cross-functionally with finance, payroll, procurement, operations, and external advisors to help ensure timely filings, accurate tax accounting, strong internal controls, and compliance with applicable regulations. The role also requires regular coordination with HQ in Korea and the parent company, Celltrion USA Inc., to align tax reporting, compliance activities, and capital asset matters across entities.

Key Objectives/Deliverables:

Manage for Results /Strategic Planning:

• Execute tax compliance activities and maintain schedules for all applicable tax filings, payments, registrations, reconciliations, and supporting documentation.
•  Prepare and review workpapers for federal, state, and local income taxes, sales and use tax, payroll tax, property tax, annual reports, and other tax obligations. Support tax provision and related account reconciliations as needed. 
• Manage fixed asset and capital accounting processes, including tracking capital projects, reviewing capitalization requests, maintaining asset records, and calculating monthly and annual depreciation.
•  Identify process improvement opportunities to strengthen controls, improve accuracy, and support timely reporting across tax and capital asset activities.

Manage Relationships with Key Stakeholders and Customers:

• Work closely with internal stakeholders across accounting, payroll, procurement, operations, FP&A, and project owners to gather required data, resolve tax issues, and support capital project approvals and asset classification decisions. 
• Coordinate with external tax advisors, auditors, and regulatory authorities as needed to support filings, notices, audits, and information requests. 
• Provide clear guidance to business partners on tax documentation requirements, exemption certificates, use tax accruals, and capitalization policies. 
• This role also requires ongoing coordination with HQ in Korea and the parent company, Celltrion USA Inc., to support information sharing, reporting alignment, and cross-entity tax and fixed asset matters.

Staff Development and Management:

• This role will not initially include direct people management responsibility; however, the individual is expected to demonstrate ownership, accountability, and the ability to guide less experienced team members or cross-functional partners on tax processes, documentation standards, and fixed asset procedures. Support knowledge sharing, standard operating procedures, and training materials as needed.

Resource Management:

• Maintain organized tax calendars, filing trackers, fixed asset subledgers, depreciation schedules, and supporting documentation to ensure efficient execution and audit readiness. 
• Use ERP systems and spreadsheet-based analyses to monitor tax accounts, capital expenditures, asset additions, disposals, transfers, and depreciation activity. Support data integrity, document retention, and compliance with internal controls and company policies.

Basic Requirements:

• Bachelor’s degree in Accounting, Finance, or a related financial field.
• 3-7 years of relevant experience in accounting, tax, or financial operations with a strong emphasis on tax. 
• Hands-on experience with multiple tax types, including income tax, federal tax, state and local tax, sales and use tax, payroll tax, and other business taxes as applicable. 
• Experience preparing reconciliations, maintaining supporting schedules, and working with tax filings, audits, or notices.
• Familiarity with fixed assets and capital accounting, including capitalization principles and depreciation.
• Strong analytical, organizational, and problem-solving skills with attention to detail and ability to manage deadlines.

Additional Preferences:

• CPA, MST, or progress toward a professional certification is preferred. Experience in a manufacturing, pharmaceutical, life sciences, or other regulated environment is a plus. 
• Experience with ERP systems, fixed asset modules, tax software, and advanced Excel skills preferred. Knowledge of property tax renditions, business licenses, exemption documentation, and internal control environments is beneficial. 
• Ability to communicate effectively across functions and work independently in a fast-paced environment.

Other Information:

This position supports both ongoing tax compliance and operational accounting for capital assets. The role may require periodic interaction with external service providers, auditors, and taxing authorities. Limited travel may be required based on business needs.

This is a banded role, and candidates will be placed within the range based on experience, skills, internal equity, and market considerations.

Celltrion Branchburg, LLC offers a comprehensive benefits package that includes paid time off (holidays, vacation, and additional leave), medical, dental, and vision insurance, life insurance, a company-matched retirement savings plan, wellness programs, and short- and long-term disability benefits. This role requires up to 10% travel, on-call availability, and may involve shift work. Hybrid work flexibility may be available based on business needs; relocation assistance is not provided. 

Celltrion Branchburg, LLC is proud to be Equal Opportunity Employer and does not discriminate on the basis of age, race, color, religion, gender, sexual orientation, gender identity or expression, national origin, protected veteran status, disability, or any other legally protected status.