THE TEAM
We work for the entrepreneurs who form the backbone of our economy. Who earn their money and just pay taxes. And who provide employment. We work for entrepreneurs who are careful about their business, their customers and their people. We work for entrepreneurs who add value. For themselves and for their customers. And who expect the same from us. That is why we like to introduce ourselves to you.

“After finalizing my study “Tax Law” at the University of Amsterdam in 1993, I started as a tax lawyer at PWC tax consultants. I noticed that I was able to build close relationships with customers of the firm. Maybe that’s because I am fascinated by entrepreneurship and feel personally involved with directors and/or owners of privately-held companies.”
(Monday to Friday)
+31 6 53 81 50 02
w.koeman@stellartaxadvice.com
2018-heden Medeoprichter/adviseur Stellar Tax Advice, Haarlem
2011-2018 Eigenaar Fiscale Praktijk Wouter Koeman
2010-2011 Partner Bannink Belastingadviseurs, Haarlem
2007-2010 Belastingadviseur Van Ooijen Belastingadviseurs, Haarlem
2001-2007 Belastingadviseur RSM belastingadviseurs, Amsterdam
1999-2001 Fiscaal adviseur MeesPierson / MeesPierson Trust Curaçao
1992-1999 Belastingadviseur PwC Amsterdam
1985-1992 Fiscaal recht Universiteit van Amsterdam

“After finalizing my study “Tax Law” at the University of Amsterdam in 1993, I started as a tax lawyer at PWC tax consultants. I noticed that I was able to build close relationships with customers of the firm. Maybe that’s because I am fascinated by entrepreneurship and feel personally involved with directors and/or owners of privately-held companies.”
Stellar is a young company with an entrepreneurial team. I enjoy building the company exactly how we want it to be for the client and for us. What clients say about me? That I’m efficient, can explain thing clearly and always strive for the best results. My father (former senior lecturer at
the University of Amsterdam) gave me the best life lesson: “Stay true to yourself, and do what you are good at”
(Monday to Friday)
+31 6 12401131
m.alkan@stellartaxadvice.com
2018-now Co-Founder Stellar Tax Advice, Haarlem
2017-2018 Owner Valerius Consultancy, Aerdenhout
2017-2017 Tax Manager Prudence Tax & Consultancy, Amsterdam
2011-2017 Tax Manager HVK Stevens, Amsterdam
2006-2011 Tax specialist PwC, Amsterdam
2002-2007 Fiscaal Recht/International Tax Law Universiteit van Amsterdam

During my time at Nyenrode Business University, where I obtained Bachelor of Science in Accountancy and Controlling, I simultaneously gained my experience as an auditor and accounting specialist at a mid-sized accounting firm. While there I realized that I could easily develop a pleasant relationship with my customers.
After a period of working for various secondment agencies and administrative offices, I obtained my RB Title (Register Tax Advisor) and became a partner at Stellar Tax Advice. My customers like the fact that I have an efficient, proactive and enthusiastic approach to solving financial and tax issues. I do not shy away from automation and communication. This allows me to quickly process the administration of Stellar’s customers, which are also clear and transparent towards the customer. This makes me a sounding board for our customers by which I can proactively think along and respond to complex administrative issues. At Stellar, we have great pleasure in providing the best quality for our customers and that suits me as a Stellar partner. “
(Monday to Friday)
+31 6 51 55 59 36
d.yasar@stellartaxadvice.com
2020 – currently Partner at Stellar Tax Advice, Haarlem
2019 – 2020 Accountmanager at QFC, Haarlem
2017 – 2019 Accounting Advisor at Van der Kloet, Amsterdam
2016 – 2020 Register Belastingadviseur, Markus Verbeek
2014 – 2017 Financial Consultant at Fintellect, Haarlem
2014 – 2017 Manager at House of Solutions, Haarlem
2014 – 2015 Financial Accountmanager a.i. at Intertrust, Amsterdam
2014 – 2014 Toetser a.i. at CBF, Amsterdam
2007 – 2014 Auditor at Bannink, IJmuiden
2007 – 2014 Bachelor of Science in Accountancy en Controlling, Nyenrode
During my education Junior Assistant Accountant Level 4 at the ROC of Amsterdam, I started as an intern at Stellar. Meanwhile, as of January 1, 2022 I am fully employed by Stellar as Assistant Financial Services and in 2023 I started my HBO Tax Law and Economics study at Markus Verbeek.
Whether it is processing accounts, taking care of tax returns, compiling financial statements or a question from a client, I take great pleasure in making sure that the client will be well served. In addition, I have become a recognized Moneybird Advisor.
(Tuesto Friday)
s.brouwer@stellartaxadvice.com
2023 – currently HBO Fiscaal Recht en Economie bij Markus Verbeek
2022 – currently Assistent Tax Compliance bij Stellar Tax Advice
2021 – 2021 Stagiaire bij Stellar Tax Advice
2020 – 2021 Junior Assistent-Accountant aan het ROC Amsterdam.

I am a third year Tax Law student at the University of Amsterdam. I combine my study with work as a Junior tax lawyer at Stellar Tax Advice. During my study I developed an enormous interest in certain fields of tax law, especially International Tax Law.
As a junior tax lawyer, I prepare the documents to provide the most complete advice to companies and individuals. Both nationally and internationally. It gives me great satisfaction to look in detail into the tax matters for Stellar’s customers and provide them with the best advice.
At Stellar I got a great opportunity to apply my theoretical knowledge in practice and to further develop myself as a tax lawyer.
My colleagues and friends describe me as a team player who is very social and has a lot of perseverance. I have developed these skills in the many years that I have played water polo and are crucial in business today.
Stellar it is an informal office that is the ideal place to grow and where everyone feels at ease.
(Monday to Thursday)
a.berehulya@stellartaxadvice.com
2019 – present Junior tax lawyer at Stellar tax advice
2018 – present Tax Law at Universiteit van Amsterdam
2016-2018 Tax Law and Economics at Hogeschool van Amsterdam
In 2023, I started at Stellar as an intern to complete my studies in Business Administration and Control Specialist at the ROC in Amsterdam.
During my internship, I enjoy processing the administrations of Stellar’s clients and preparing tax returns.
(Monday to Thurday)
m.ckutuk@stellartaxadvice.com
2019 – currently Business Administration en Control Specialist aan het ROC Amsterdam.
‘I was a public accountant until the end of 2019, doing composition and audit work. After my 65th birthday, I joined Stellar Tax Advice. As the son of a garage owner, I know the problems and challenges of entrepreneurs. I am therefore mainly the discussion partner for clients in small and medium-sized businesses. With an emphasis on family businesses.’
did my training at Markus Verbeek Praehep University of Applied Sciences, where I also taught myself (tax law for SPD). At the NBA, I graduated as an AA accountant. I gained practical experience at BDO and Deloitte, after which I ran my own accounting / consulting firm for 25 years.
I always ask a client “How is your succession arranged?” first. That opens up a good conversation about entrepreneurship and continuity. Then comes the annual accounts and tax return, ultimately that is just history!
(Monday/Tuesday/Friday)
t.klaver@stellartaxadvice.com
2023 – currently HBO Fiscaal Recht en Economie bij Markus Verbeek
2022 – currently Assistent Tax Compliance bij Stellar Tax Advice
2021 – 2021 Stagiaire bij Stellar Tax Advice
2020 – 2021 Junior Assistent-Accountant aan het ROC Amsterdam.