Global Mobility Tax Manager

Muehlhan Group; Porto; On-site; EUR 95,000 - 125,000; Full time

Benefits offered by this job

Health insurance

Employee Assistance Program

Flexible working arrangements

Career development opportunities

International exposure

Continuous training and development

Team-building activities

Meal allowance

Snacks and fruit

Gifts for occasions

Job summary

Muehlhan Wind Service in Porto is seeking a Global Mobility Tax Manager to lead payroll-tax, social security, and related compliance for international deployments within the group. The role reports to the Global Head of Tax and demands hands-on ownership of processes, systems, and governance.

The successful candidate will travel 50-60 days per year across Europe and the Americas, requiring business-fluent English and a proven track record in global mobility taxation and cross-border payroll.

Qualifications

• 10+ years of strong Global Mobility Tax experience or expatriate taxation.
• Fluent business English; additional languages are a plus.
• Experience with cross-border payroll, tax residency rules and DTAs.

Responsibilities

• Oversee Mobility Tax functions and align with Group Tax.
• Propose, implement and roll out system landscape and automation.
• Manage external tax and mobility advisors for the group.

Skills

Global Mobility Tax

Expatriate taxation

International wage/payroll tax

Cross-border payroll

Tax technology and automation

Tools

AI in tax

Tax technology platforms

Job description

Join Us in Powering the Future of Renewable Energy

Are you passionate about green energy and looking to be part of a dynamic, fast-growing international organization?

At Muehlhan Wind Service, we are driven by a shared ambition to support the global energy transition. Through the expertise, dedication, and commitment of our people, we deliver high-quality solutions that contribute to lowering the cost of green energy worldwide.

If you are looking for an opportunity to make a real impact, work alongside talented professionals, and grow your career in a thriving and purpose-driven environment, Muehlhan Wind Service could be the place for you.

About the role and key responsabilities

The Global Mobility Tax Manager (GMTM), based in our office in Porto, is responsible for all payroll-tax, social security and related compliance matters arising from the international deployment of employees within the Muehlhan Group. The role is part of Group Global Tax Department and reports to the Global Head of Tax.

The GMTM owns processes, systems, implementation and results. External local advisors provide country-specific technical expertise.

The chosen candidate must have the availability to travel 50-60 days per year, mainly in Europe and Americas (this is a mandatory requirement).

Skills, Knowledge and Experience

Organization & Processes

• From day one: oversight of the two existing Mobility Tax functions and involvement of the relevant colleagues.

• Proposals, implementation and roll out system landscape and process automation within the Mobility Tax area.

• Implement Group-wide "Tax-as-a-Service" in Mobility Tax area.

Technical Scope

• Individual employee income tax, tax residency and Double Tax Treaty matters;

• 183-day rules and economic employer considerations;

• Cross-border payroll, wage tax, social insurance and shadow payroll;

• A1 certificates, social security and Certificates of Coverage;

• Posted Worker and related mobility compliance;

• Business traveler's and international project deployments;

• Identification and escalation of permanent establishment risks;

• Management of external tax and mobility advisors.

Profile:

• >10 years of strong experience in Global Mobility Tax, expatriate taxation, international wage/payroll tax or social security;

• Strong knowledge of international individual taxation and Double Tax Treaties;

• Strong practical experience with cross-border payroll and social security;

• Track record in process standardization, tax technology and automation (ideally using AI);

• Hands-on mentality: Takes ownership, acts quickly, follows up until completion;

• Experience managing and challenging external advisors and service providers;

• Business-fluent English (C1, proven) is a must; third language is an advantage;

What we offer

• Health insurance and Mental Health Support

• Employee Assistance Program (Workplace Options)

• Flexible working arrangements

• Career development opportunities

• International exposure within a dynamic and fast-growing environment.

• Continuous training and development

• Regular team-building activities and celebration events

• Meal allowance (paid in meal card)

• Free fruit, snacks and soft drinks in the office

• Gifts for special occasions (Birth, Christmas and round work anniversary)

Equal Opportunities Statement

Muehlhan Wind Services is committed to creating an inclusive and diverse workplace. We welcome applications from all qualified candidates and make employment decisions without regard to race, religion, gender, age, disability, sexual orientation, or any other protected characteristic.

Location and Start Date

Location: Porto, Portugal

Start Date: 2026 or early 2027

About Muehlhan Wind Service

Muehlhan Wind Service (MWS) is a world-leading, full-scope independent service provider, specializing in wind turbine installation and Operations & Maintenance solutions global wind energy clients.

Headquartered in Fredericia, Denmark, MWS is part of the Muehlhan Group, an international industrial services company based in Hamburg, Germany. With operations spanning multiple countries and business units, we deliver specialized solutions across the entire lifecycle of wind energy assets, both onshore and offshore.

Our expertise covers a wide range of services, including onshore and offshore installation, high-voltage and electrical services, blade inspections and repairs, statutory inspections, main component exchange, paint, special projects, manpower solutions, welding repairs, and more.

At Muehlhan Wind Service, our people are at the heart of everything we do. We are proud to foster a collaborative, international, and safety-driven environment where talented professionals can grow, make an impact, and contribute to the global transition towards renewable energy.

If you are passionate about working in a dynamic industry and want to be part of a team that is helping shape the future of sustainable energy, we would love to hear from you.

For more information, please visit www.muehlhan.com.