Ariën van Heesen is a partner in the Real Estate practice group, where he specialises in commercial real estate, real estate transactions, and finance and securities. He has experience in the field of commercial real estate and financial transactions and advises and guides businesses, government agencies, private equity houses and banks in issues involving real estate and real-estate finance. He worked in the Corporate Law practice group until 2005.

Ariën followed the specialist course in Real Estate Law at Grotius Academie and is a member of the Vereniging voor Jonge Onroerend Goed Juristen (Association of Young Real Estate Lawyers) and the Royal Netherlands Notarial Organisation.