Oceania is an example of a region where traditional security theory based on historical enmity and competition does not fit. A history of amity and cooperation has evolved through regionalism and the region's pre-eminent organisation, the Pacific Islands Forum (the Forum). In 2004, the Forum was tasked to develop the 'Pacific Plan' (the Plan) to facilitate closer cooperation and deeper integration. Security is one of the four pillars of the Plan. The objective of this thesis is to analyse the institutions of the Forum as facilitators of regional security cooperation. The Forum is reviewed and the idea of a logic of action is introduced. To help explain security in an environment with a history of cooperation, traditional security theory is re-defined. A security environment equation is created as a framework to help analyse the Forum's structures and security mechanisms. The Forum Regional Security Committee is examined closely resulting in suggestions to strengthen the region's security environment.