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Hendrik-Jan van Duijn

International Tax Partner & CEO

Hendrik-Jan van Duijn

Education

In 1998, Hendrik-Jan was awarded a fully-certified Bachelor’s Degree in Accounting Administration Consultancy. He subsequently studied Tax Law in Leiden. Since 2002, Hendrik-Jan has been a member of the Nederlandse Orde van Belastingsadviseurs.

Career

Hendrik-Jan specializes in Partnership and Dividend Taxation, particularly in cross-border investments, mergers and take-overs, partnerships and industrial restructurings. In 2002, he began working with BDO. 4 years later, in 2006, he moved to PwC. In 2008, he moved to New York to work as a tax consultant. While there, he gave advice to US and Canadian businesses wishing to expand or streamline investments, either in or via the Netherlands, as well as to Dutch companies investing in the US and Canada.

Experience

With more than 15 years’ experience in the area of Dutch Corporate and Dividend Taxation, Hendrik-Jan has built up an impressive record of service. In 2011, he set up Duijn’s Tax Solutions and has seen it grow into a successful taxation consultancy. Hendrik-Jan is also behind the creation of many networks. He is, among other things, co-founder of Doing Business in, a network of specialists in the Netherlands and abroad, and of Pro-tp, through which he, along with his partners, offers international transfer-pricing advice. As a specialist in international Tax Law, he also writes for the IBFD.

Joost de Leeuw

Tax Partner

Joost de Leeuw

Education

In 2007, Joost began studying Law at the University of Amsterdam, having previously studied for his Bachelor’s Degree in Russian Language and Culture. Due to his wide variety of interests, Joost has successfully completed Master’s Degrees in both Criminal and Tax Law. In 2015, he completed his studies with a thesis on participation exemption. Joost is an aspiring member of the Nederlandse Orde van Belastingsadviseurs, which means that he closely follows the latest developments in (international) tax law. He also participates in seminars organized by various bodies, such as the Ministry for Finance, the Chamber of Commerce and the University of Lausanne.

Career

After a short period as a journalist and translator, Joost has found his calling in the legal world. With business in his blood, he has always been attracted to entrepreneurship. During his studies, he was struck by the enormous inequality between the tax possibilities for multinationals and those for SMEs. He feels that this is too disruptive to the markets. Therefore, it is Joost’s ambition to make tax benefits accessible to all entrepreneurs. In this area, he is committed at both a policy and client level. After three years with DTS, Joost is currently working as tax manager and is, among other things, responsible for the Asia Desk.

Experience

“I find the best thing about my job being that moment when a client realizes just how valuable good tax advice can be. The difference between what a company pays in taxation before and after our advice is often much greater than the profit made through a reorganization or an advertising campaign. Thus, tax advice has also added value in a commercial sense and is indispensable in every business plan.”
As a tax consultant, Joost is never doing the same thing every day, because no client is the same. He advises companies and investors in diverse sectors and countries. Applying the innovation box prior to a tech start-up, for example, is completely different to giving transfer-pricing advice to a food importer, but both are nevertheless in the area of partnership taxation.

Kim Sinnige

VAT Partner

Kim Sinnige

Education

In 2001, Kim completed her Fiscal Economics training at the Hogeschool voor Economische Studies (HES) in Amsterdam. She subsequently studied Fiscal Law in Leiden. Upon completion of her studies, she specialized further through the Nederlandse Orde van Belastingsadviseurs (NOB or Dutch Association of Tax Consultants).

Career

Before completing her studies in Amsterdam, Kim began her career as a VAT consultant with Deloitte. 9 years later, Kim became a partner at A. Sinnige Administratiekantoor. At the same time, she set up her own consultancy firm, Sinnige Btw-Advies. Since then, Kim has seen her business develop into a successful consultancy firm. Along with this, she writes advice for Indicator BV and Kluwer Avanzer. Since 2014, Kim has been working with DTS.

Experience

Kim is an experienced all-round VAT advisor. She specializes in, among other things, VAT advice in the areas of international trade and financial services, real estate, education, healthcare, and sports. On top of this, she deals with national and international VAT registrations and VAT returns, and writes for diverse trade magazines.

Wefa Ismail

Tax Advisor

Wefa Ismail

Education

In 2015, Wefa started her studies in Law at Radboud University in Nijmegen and subsequently pursued a Master’s degree in Tax Law. She also delved into Transfer Pricing and completed various courses in this field.

Career

In 2020, Wefa began her career as an intern at DTS Duijn’s Tax Solutions. After her internship, she joined the company as a paralegal and was later promoted to Junior Tax Advisor. During this period, she also assisted with several incorporations at our partner company, Company NL.

Experience

Currently, Wefa is an invaluable asset to our DTS team in Amsterdam – specializing in Transfer Pricing and focusing her work on the tax implications of protective levies and 30% scheme procedures. She thrives on tackling complex issues, always up for a challenge, and never backing down from testing her skills. Wefa has become an integral part of the team – contributing her expertise to ensure successful outcomes. She finds great satisfaction in her work and the results it yields.

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Amsterdam – Kleine-Gartmanplantsoen 21
Arnhem – Willemsplein 34-2
Breda – Ceresstraat 13
Nederland



DTS Duijn’s Tax Solutions B.V.
Bank: Rabobank
BIC: RABONL2U
IBAN: NL64RABO0167742167