Thessa Menssen joined the Port Authority in 2006. Until 2011 she was CFO (chief financial officer), and she has been COO (chief operational officer) since January last year. On 1 September 2012 she will leave the Port Authority to start work on 1 October, after appointment by the general meeting of shareholders of BAM, at this large construction and property services enterprise that operates on an international level.

Thessa Menssen has played a steering role in the development of the Port Authority in the past six years. Increasing professionalisation and making the organisation more businesslike, amongst others on a financial level, were important priorities in this period, shortly after the Port Authority was corporatized.

The Supervisory Board of the Port Authority will start the procedure to recruit and select a new COO.