Within ecologies of intermediation, multiple intermediaries and their initiatives operate with overlapping remits and associated conflicts. To understand these, we propose a typology of conflict sources, applying this to the case of a university-based sustainability intermediary in Spain (itdUPM). itdUPM acts as an umbrella organisation for initiatives that connect stakeholders in pursuit of sustainability objectives. Analysing the case with its embedded sub-units, we distinguish between: (1) value conflicts connected to actors’ identities and ideologies; (2) socio-cognitive conflicts related to the need to hold consistent and socially validated cognitions; (3) conflicts of interests, which emerge when actors’ interests in terms of resource allocation, including power, are misaligned. We highlight the importance of a nuanced understanding of conflict types as part of intermediation processes, including those arising from the dynamic interactions between specific intermediation initiatives and their broader contexts. We also propose conflict management strategies to assist in this in practice.