This article analyses the nature of coordination between the various stakeholders during the design and implementation of a disarmament, demobilisation and reintegration (DDR) process. It makes detailed reference to the contemporary DDR programme in South Sudan as this African country is a relevant example of significant international and local efforts to facilitate DDR coordination in a fragile and complex political and operational environment. The analyses showed that in South Sudan, coordination appeared to have been negatively affected by hierarchical, convoluted and inflexible organisational structures and arrangements. In addition, further contributing factors included: inadequate communication; uncertainty over roles and responsibilities; and unequal access to financial resources. Moreover it was apparent that these arrangements and dynamics fostered inter-organisational tensions and eroded trust between stakeholders. This ultimately resulted in fragmented and sub-standard DDR outcomes.