Bas is a partner and Head of Real Estate and Infrastructure at Osborne Clarke Amsterdam, The Netherlands.

He specializes in the civil law aspects of property; contracting and advising on:

turnkey, purchase, and sale and leaseback projects, such as the purchase of various office blocks, shopping centers, hotels and distribution centers (from data room to deed of transfer); residential, retail and office development projects in both the private as the public sector; Vinex residential development (designated by the government for future urban development) plan transfers and structuring of joint ventures; construction team agreements, contracting agreements, and design and build contracts; letting and leasing of commercial and retail premises, and residential dwellings and FIDIC contracts.

Bas also has a focus on litigation, representing clients in civil and arbitration proceedings.

Bas was admitted to the Dutch Bar Association in February 1999. He completed the post-doctoral Grotius Immovable Property program of study cum laude.

He is a member of several Real Estate groups in The Netherlands, the Association of Property Lawyers, the Association of Construction Law and the Association of Construction Law Lawyers.