Tax Manager, International Tax

About the role

As Tax Manager, International Tax, you will play a key role in managing international tax matters, tax audit readiness and tax controversy topics across Fortum. Working in close co-operation with the business and the Fortum Group Tax Team, you will apply Fortum’s Tax Principles when advising on complex cross-border transactions, internal financing, transfer pricing and strategic tax planning. You will also coordinate tax audits and litigation related to internal financing by working with tax authorities, external legal advisers and internal stakeholders. The position is based in Shannon, Ireland.

In your role, you will:

• Advise on and optimise the tax aspects of international transactions, including internal financing, leasing and Treasury matters
• Contribute to Group transfer pricing documentation and manage internal financing, leasing and Treasury transfer pricing topics end to end
• Manage the tax audit readiness process for material and cross-border transactions, identifying high-risk areas and ensuring effective controls and documentation
• Participate in cross-border and tax audits and litigation, with particular focus on double tax agreements and internal financing matters
• Review tax assessments, court decisions and legal documentation, and prepare technical responses, appeals and defence submissions
• Manage Irish mandatory disclosure obligations and contribute to tax advocacy in strategic litigation
• Build effective relationships and work in close co-operation with business stakeholders, tax authorities and external advisers across multiple countries

About you

You will have a strong academic and professional background in tax, with deep knowledge of international tax law. You are comfortable analysing complex issues, applying sound judgement and working with diverse stakeholders in an international business environment.

To succeed in this role, you will have:

• Relevant academic qualification in tax, law, finance or a related field
• At least 5 years of experience in international business and tax
• Deep knowledge of tax law, international taxation, transfer pricing, tax audits and legal processes
• Ability to analyse tax assessments and legal documentation and prepare clear, robust technical submissions
• Fluency in written and spoken English

In addition, you bring:

• Strong analytical skills, logical thinking and sound judgement
• Clear communication, influencing and stakeholder collaboration skills
• A business-oriented mindset and confidence working with financial information
• Confidence in using AI and other digital tools responsibly to support research, analysis and process improvement
• Ability to coordinate differing interests and processes across countries and functions
• A proactive approach to improving processes and helping others meet tax and compliance requirements

Interested?

Submit your application latest on 26/6/2026. We start contacting suitable candidates already during the application period, and the position may be filled before the final application date. If you have questions and would like to hear more about the position, please contact Jennifer Teeling-Lynch, Jennifer.Teeling-Lynch@fortum.com, +353879309109.

We are Fortum

Fortum is a Nordic energy company. We generate and deliver reliable energy to our customers and the Nordic energy system while at the same time helping industries decarbonise their processes and grow. Our core operations comprise efficient and best-in-class low-carbon power generation, customer services, and heating and cooling. Fortum’s power generation is already 99% from renewable or nuclear sources with one of the lowest specific CO2-emissions in Europe. We are guided by our ambitious SBTi-validated emission reduction targets on our way towards net-zero by 2040. For our ~4,500 employees, we commit to be a safe and inspiring workplace. Fortum's share is listed on Nasdaq Helsinki. fortum.com