Military personnel need to develop new requisite competencies to successfully implement the national security strategy. Today, whether military personnel are assigned to staffs in Washington, D.C. or operating in a geographic area of responsibility, they will be routinely involved in interagency operations. The diversity of governmental and nongovernmental agencies involved in interagency operations, each agency having its own culture, makes unity of effort difficult. This problem of diversity between participating organizations, compounded by low technical and procedural commonality together with the absence of concordant interests, create significant obstacles to effective interagency coordination. Military personnel must develop a better understanding of the inherent complexity of interagency operations to be effective. Understanding the culture of governmental and nongovernmental organizations is a key competency for successful interagency operations.With the knowledge of the participating organizational culture comes the empowerment to effect consensus. Consensus building allows personnel to move their represented disparate organizations toward an acceptable strategic concept. The thorough investigation and understanding of organizational cultures coupled with the deliberate methodology of applying that knowledge toward achieving consensus on acceptable multi-agency concepts is the foundation of effective interagency operations. The associated tactics, techniques, and procedures should be incorporated into joint and service doctrine.