Stacks Image 6
Henk is a founding member and Partner of Hillbrook. In 2009, he branched out on his own after spending over 15 years with Arthur Andersen and Deloitte. As a Senior Director in Deloitte’s International Assignment Services department, he was responsible for major client engagements and providing specialist expatriate tax and HR consultancy services. Henk was a teacher of cross border employment for 4 years at the Dutch Association of Tax Advisers (NOB). In 2013, he became a teacher again at the Expatise Academy, teaching global mobility (GM) professionals on the 30%-ruling. Further, Henk is very much engaged in the GM industry in the Netherlands and is the Chapter Leader of the Forum for Expatriate Management (FEM) in the Netherlands. In this capacity Henk organizes quarterly FEM seminars for GM professionals on different trending topics such as immigration, talent management, international employment law, policy benchmarking, 30%-ruling and other GM topics.

His area of expertise is expatriate tax compliance and consultancy. Henk has written a booklet on the 30%-ruling and numerous published articles on cross-border employment. As from 2004, he has been an author for the monthly payroll magazine ‘Praktijkblad voor de Salarisadministratie’.
Stacks Image 7
Lyke is a Tax Lawyer and Partner of Hillbrook and has over 20 years’ experience in the field of expatriate tax, international mobility and assignment management. Before joining Hillbrook in December 2013, Lyke worked for almost 2 years with Boxx, an expatriate consultancy firm in Belgium. Prior to that, she worked for more than 13 years in the International Assignments group of PricewaterhouseCoopers, managing several large client engagements and providing technical advice and guidance to HR, Tax and Finance professionals on all aspects of assignments including compensation, tax and HR issues. She was also responsible for the Sales & Business Development of the International Assignments group. Since 2012 Lyke has been a teacher at the Expatise Academy, teaching the subject ‘Understanding the system of international taxation and the avoidance of double taxation’.

Lyke’s area of expertise is in international tax and social security planning for expatriate individuals, but also has a broad knowledge of immigration/visa and experience with outsourcing projects. Lyke has a degree in both Civil Law and Tax Law.
Stacks Image 7
Erik is a Partner of Hillbrook and one of the firm's founders. He started his tax career with Price Waterhouse before leaving to set up his own tax advisory business. Erik’s former Price Waterhouse colleague Henk Amorison joined in 2010 and together they formed Hillbrook Expatriate Tax Solutions in May of that year.

Erik specializes in start-up and growing businesses including sole proprietorships, partnerships and private limited companies. He has been assisting entrepreneurs for many years on a wide range of Dutch tax and compliance matters, including those with cross border activities. Erik also has a wealth of experience in the tax and financial aspects of divorce, in addition to the handling of tax compliance aspects of Dutch State Monuments. Erik graduated in Tax Law from Amsterdam University in 1987.



We can review your Dutch tax and social security position, in the context of your residency position (both past and present) to provide advice on how to best structure your affairs in order to minimise your tax burden. As an expat you often have more than one tax jurisdiction to consider and your remuneration packages can be more complicated with items such as tax equalization between home and host employers. At Hillbrook we can work closely with you to unravel all of these complexities and counsel you on what needs to be done to ensure your affairs are structured efficiently and compliantly.


An expat often has more than one tax jurisdiction to consider and remuneration packages can get quite complicated with items such as tax equalization, stock option income and foreign social security entitlements. For the expat, Hillbrook can advise on residency status, tax position and social security consequences. By working closely with the expat, we can ensure that all personal tax matters are compliant and the tax burden is kept to a minimum. For the employer, Hillbrook can advise on global mobility issues such as:

  • Salary split calculation and implementation
  • Cross border social security
  • Termination agreements and severance package structuring
  • Cross-border implications share-based incentive plans
  • Tax equalization calculations
  • Assignment planning and compensation structuring
  • Tax and social security planning during the year of departure/ repatriation
  • Drafting and reviewing employment contracts and assignment agreements

Please contact Lyke Apontoweil or Henk Amorison for further information.