This article presents the findings from the evaluation of the pilot of a new entry qualification for school principals in South Africa. The programme, Advanced Certificate in Education (ACE) School Leadership, had networking as a distinctive feature, and this article examines candidates' perceptions and experiences of networking as a leadership development process. The methodology combined the survey, interviews and observations. The findings revealed that the practice, development and sustainability of networks were complex; networking advanced shared learning and facilitated candidates' programme completion while addressing school-based problems through site-based assessment. However, networks were noted to be patchy, with a few operating successfully, but most still requiring development. (Contains 1 table and 1 note.)