The Cursillo Movement is not an organization, but uses certain organizational elements in order to function and to achieve its purpose. The purpose or goal of the Cursillo Movement is to Christianize Environments. In order to have this effect on environments, the Cursillo strives to provide understanding and conviction to individuals about what is necessary for being a Christian, and to strengthen individuals so they may live out that conviction, supported by a Christian Community.

The work of the Cursillo in a diocese requires coordination by a small group of clergy and lay men and women called the Secretariat.  A typical Secretariat consists of the Spritual Advisor(s), Lay Director, Treasurer, Secretary, and the chairpersons of the Precursillo, 3-Day, Postcursillo, and School of Leaders committees.  A Secretariat may also have Ad-hoc, non-voting  members.  The Secretariat is responsible for all aspects of the Cursillo Movement, although it delegates and oversees work to the School of Leaders and various committees and subcommittees. The Secretariat shall primarily function as the "Servant of the Servants".  The Secretariat reports to and serves the Bishop of the diocese.

The Cursillo Movement operates under a set of approved By-Laws.