The Graduate Professional Diploma Program (GPDP) was established through this project and was added to the IHE Delft portfolio of courses in 2015. Since then more than 150 participants from twenty countries have enrolled in the program and 25 have so far earned a diploma. GPDP disseminates sanitation and sanitary engineering knowledge to professionals without the means, time or interest to pursue an MSc degree in this field, or with an MSc Degree in a related field and a wish to specialize professionally. The program consists of a sequence of four or five online courses, regular short courses or a combination. The online courses can be followed part-time, without interrupting a day time career. In order to ensure that the program fits the personal circumstances of the applicant, courses will be selected and a personal study plan will be designed in collaboration with a study adviser. Following the popularity of the first GPDP, more have been developed at IHE Delft and more will become available at partner institutions.