While studies on the role of knowledge and expertise have seen a resurgence of interest in International Relations and in literature on peacebuilding and security governance, little is known how knowledge enters the governance routines after the initial establishment of peacebuilding operations. Taking the mandate decision-making process of MINUSMA and EUTM operations in Mali in the German parliament as case for our explorative study, we ask how knowledge has entered the parliamentary process and how various epistemic practices and epistemic agency shape this peacebuilding governance since 2013. Informed by an object-centred knowledge framework, we argue that the practices and types of agency involved mostly ‘lock-in’ the governing of robust peacebuilding in Mali in much broader foreign- and security policies routines. Epistemic practices are not primarily concerned with new impulses or critical analysis, but with rendering Mali governable as interventionary object. The epistemic authority of the government is dominant and we do not find much evidence that hegemonic knowledge is challenged. Intervening agents do extract certain knowledge via transnational channels from Mali, however, broader knowledge debates or the involvement of Malian agents are missing.