It is becoming clear that the project management practice must embrace sustainability in order to develop into a 'true profession' (Silvius et al., 2012). In project management, sustainability can be gained in both the product of the project and in the process of delivering the product. (Gareis et al., 2010) Nine sustainability principles have been identified that should be implemented in the project management practice. These nine principles are: (1) values and ethics; (2) holistic approach; (3) long term view; (4) large scale; (5) risk reduction; (6) participation; (7) accountability; (8) transparency; (9) stakeholder interest. In a case study it is researched which project and program management roles can exert an influence to have the sustainability principles implemented in the project management practice and how they can accomplish this implementation.