This thesis looks at the use of cabinet committees in Manitoba as part of the cabinet decision-making process. Very little work has been done on this important facet of cabinet government in Canada. I address three research questions related to the use of cabinet committees under each of the premiers from 1958 to 2021. First, what was the structure of cabinet committees each premier employed? Second, what was the impact of these different structures on governance? Finally, how and why did the cabinet committee system change under each premier? By answering these questions, I argue that the Manitoba experience with cabinet committees reveals that the essential approach to governance taken by each first minister can be derived from their choices concerning cabinet committees. The research reveals that premiers in Manitoba rely on two committees as the pillars of their cabinet committee structure. The first committee is Treasury Board, which is a constant within the cabinet committee system. The second committee is either a coordinating committee or an economic development committee. Both committees are chaired by the premier. The thesis also looks at the use of government MLAs as part of cabinet committees.