Patrick Poldervaart is the exclusive legal advisor of ADM/HCM Sportmanagement.

ADM/HCM Sports Management is an international sports marketing agency of Ali Dursun.

The client portfolio includes Frenkie de Jong, Justin Bijlow, Tyrell Malacia, and Mohamed Ihattaren.

Patrick Poldervaart provides legal advice to ADM/HCM Sports Management  in the broadest sense of the word in the field of sports, employment and contract law such as:

  • Negotiating and drafting various types of contracts such as employment, transfer, representation and sponsorship agreements.


  • Legal advice related to the transfer of players to ensure compliance with both national and international regulations.


  • Legal advice regarding image rights, trademarks, intellectual property and work permits.


  • Legal advice regarding training compensation and solidarity contribution.