Team
The Interim Tax Network is the reliable partner for flexible tailor-made in-house tax support by experienced tax managers. All tax specialists affiliated with us have a proven track record: trained at internationally operating consultancy firms and companies. Permanent education and professional technology are self-evident and our Tax Managers are almost all members of the Dutch Association of Tax Advisers.
Marc Oostenbroek
Partner / Bedrijfsfiscalist
Marc Oostenbroek
Partner / Bedrijfsfiscalist
+ 31 6 83 20 99 14
marcoostenbroek@thesourcingpartners.nl
Marc Oostenbroek (1980) started his career at Deloitte and then EY. After 7 years, Marc switched to an inhouse position and he was General Counsel / Head of Tax and board member of the listed Vastned for 6 years. Since 2017, Marc has been an interim tax specialist/lawyer at, among others, the Van Herk group, Syntrus Achmea, Bouwinvest, APG, Trust and Eurocommercial Properties. His expertise lies in real estate, financial institutions, (bio)tech, private equity and family businesses. In addition to a broad tax base (including TP, TCF), he has extensive experience with legal, financial and compliance issues, which he preferably combines on assignments. Marc is able to build a good relationship at all levels within an organization through an open and honest style. Analytically strong and the ability to keep things simple. Results-oriented, high ethical standards and personal involvement. LLM Tax Law Erasmus University Rotterdam, MSc Real Estate & Finance, TIAS Utrecht.
Marc Magrijn
Partner / Bedrijfsfiscalist
Marc Magrijn
Partner / Bedrijfsfiscalist
+ 31 6 26 56 21 86
marcmagrijn@thesourcingpartners.nl
Marc Magrijn (1980) started his career at Deloitte and then EY. After 7 years, Marc switched to an inhouse position and he was General Counsel / Head of Tax and board member of the listed Vastned for 6 years.
Since 2017, Marc has been an interim tax specialist/lawyer at, among others, the Van Herk group, Syntrus Achmea, Bouwinvest, APG, Trust and Eurocommercial Properties. His expertise lies in real estate, financial institutions, (bio)tech, private equity and family businesses.
In addition to a broad tax base (including TP, TCF), he has extensive experience with legal, financial and compliance issues, which he preferably combines on assignments. Marc is able to build a good relationship at all levels within an organization through an open and honest style. Analytically strong and the ability to keep things simple. Results-oriented, high ethical standards and personal involvement.
LLM Tax Law Erasmus University Rotterdam, MSc Real Estate & Finance, TIAS Utrecht.
Lars van Marrelo
Commercial Director
Lars van Marrelo
Commercial Director
+ 31 6 52 71 73 82
larsvanmarrelo@thesourcingpartners.nl
After obtaining his master’s degree in tax law Lars van Marrelo (1974) started his career at the Human Capital department of EY. He provided tax advice regarding cross border employment matters. In 2005 Lars switched to Ebbinge where he was involved in the recruitment and selection of tax lawyers. Four years later he continued his career at corporate services provider Orangefield where he worked i.a. as Business Unit Director. In 2018 Lars started his own Estate Planning advisory boutique affiliated with wealth management firm Affluent. In addition, as of January 2020 he is as Commercial Director involved in The Interim Tax Network.
Bas van de Putte
Tax Manager
Bas van de Putte
Tax Manager
Bas van de Putte (1971) is a solution driven tax specialist who gained experience both as an advisor and in-house. After obtaining his master’s degree in tax law he started at Coopers & Lybrand (predecessor of PwC) within the international tax practice after which he continued his advisory career at Houthoff law firm. In 2004 he switched to in-house leading the tax departments of credit insurer Atradius and, subsequently, Corio (a listed real estate investment company, now Klepièrre). As of 2014 Bas is active as an interim tax specialist. In addition to his interim work Bas also advises start-ups, investment funds and companies with an impact signature.
Steven Ouwerkerk
Tax Manager
Steven Ouwerkerk
Tax Manager
Steven Ouwerkerk (1974) finished his master’s degree in tax law in 1999 after which he started working for Arthur Andersen. After 6 years, Steven took the decision to start working as an inhouse tax lawyer for Orange. During his time with Orange, he also became responsible for the Payroll department as well as the Finance department for the financing companies. After a short stay with FMO, Steven started in 2009 as the first inhouse tax lawyer for APM Terminals, a business unit within the Maersk Group. During the 7 years within APM Terminals, he became also responsible for the Corporate Governance department and the Treasury department. In 2016 Steven and his team won the ITR award for best direct tax team in Europe and the International General Counsel Gold Award for best Tax Strategy. From 2016 through 2019 Steven worked for Cristal after which he became self-employed. Others describe Steven as an innovator, transformator and spin doctor.
Frans Brugman
Tax manager
Frans Brugman
Tax Manager
Frans Brugman (1971) started working for Arthur Andersen after obtaining his bachelor degree in tax economics and continued his career at Royal Dutch Shell as a specialist in the field of tax compliance and reporting. After obtaining his master’s degree in tax law he started as a senior advisor at EY. At EY, he was responsible for the preparation/review of (fiscal unity) CIT returns of various multinationals, TCFs, tax paragraph in annual accounts, current and deferred tax calculations as well as compliance with enforcement covenants. Since 2015, Frans has been working as an interim tax manager, which he interrupted for 2.5 years to become head of the tax compliance practice of Taxperience.
Dennis Giesbers
Tax Manager
Dennis Giesbers
Tax Manager
Dennis Giesbers (1977) started his carreer in the International tax practice of Deloitte in Rotterdam where he advised multinationals and large family businesses. In 2017 Dennis established his own company and since then he works as an inhouse tax specialist on ad interim basis. Over the past years he fulfilled interim tax positions with different companies. Aside from this Dennis also serves companies on a continuous basis.
Anna Koolhaas
Tax Manager
Anna Koolhaas
Tax Manager
Anna Koolhaas (1975) is an experienced and internationally oriented tax professional. Her interest in taxation was ignited at what started out as a student job. She gained more in-depth knowledge and experience during her 8 years at KPMG Meijburg & Co. She moved on to work as an in-house professional at Louis Dreyfus Commodities in Switzerland, and as an interim tax manager since September 2017. She is a corporate tax generalist with ample experience in tax compliance and reporting management. She received a master’s degree in European and International Tax Law from the University of Amsterdam. Anna is a cycling enthusiast.
Jan Verboord
Tax Manager
Jan Verboord
Tax Manager
Jan Verboord (1985) is a versatile and experienced tax professional who started his career in the M&A tax team at PwC in Amsterdam, then worked for Deloitte in Amsterdam and NYC before transitioning to in-house where he has fulfilled roles in multinationals as well as midsize compagnies in the food & beverage and travel sectors. Jan has a deep knowledge of Dutch tax and international taxation. Proven record of managing complex tax positions, handling tax audits, stakeholder management, business partnering, tax reporting and building effective relationships with tax authorities and advisors. Fluent in Dutch and English. MSc in Tax economics and laws from Tilburg University.
Roos Bareman
Tax Manager
Roos Bareman
Tax Manager
Roos Bareman studied Fiscal Economics at the University of Amsterdam and started her career at the international fashion brand G-Star RAW, where she was a driven in-house tax advisor for nearly ten years. Roos’ expertise is international taxation, focusing on cross-border corporate income tax, transfer pricing and value added tax matters. During the last four years Roos was G-Star RAW’s Head of Tax. Combining the tax theory and practical implementation is where her strength lies. Early 2020, Roos started her company Bareman Fiscaal Advies, through which she provides independent tax advice and interim tax manager services. In July 2020, Roos started her first interim assignment at ASML, where she fulfils the role of interim tax manager for the EMEA region.
Saskia Kooij-Hogenbirk
Tax Manager
Saskia Kooij-Hogenbirk
Tax Manager
Saskia Kooij-Hogenbirk (1982) started her career in 2007 at the General Tax Practice of Loyens & Loeff NV after obtaining her master’s degree in Tax Economics at the Erasmus University in Rotterdam. There she advised approximately 350 clients on corporate tax, income tax and inheritance tax. She was also responsible for filing all tax returns for these clients. Eight years later, she continued her career with the Merger & Acquisition team of PwC. After working at PwC for two years and starting her own company, Saskia started working as a self-employed person in the financial and tax world in 2019.
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