The website explains:
The Ombuds Service acts as a mediator between the school and the student in the event of problems regarding the provision of education, the organisation of education and the exams.There are five members of the HUBrussel Ombuds Service: Maarten Kindt; Leen De Wolf; Marc Ophalvens; Erica Mechelmans; and Martine Van Poucke, Head of Student Services and Exam Ombuds. (HUB Ombuds.)
The Ombuds Service is the responsibility of the Centre for Student Counseling and Facilities. Confidentiality is guaranteed at all times. The information you provide us with about a lecturer will only be discussed with the lecturer with your explicit consent, if possible anonymously.