Mentoring is seen as one possible solution to support the individual development of competences in higher education. To allow this support for a large number of students, scalable technologies should be used and made available in a so called "Mentoring Workbench." In order to analyze the requirements for this "Mentoring Workbench," this paper, firstly, depicts seven mentoring roles, which can complement typical learning and teaching processes at universities. Based on an analysis of existing mentoring applications, the authors, secondly, work out to which extent these roles can be supported by existing technical solutions. As the market for mentoring software only covers part of the mentoring roles, the paper, thirdly, outlines further considerations on the technical support of the mentoring roles presented. Finally, we give an outlook on the first steps of technical implementation.