Through Baptism all the faithful share in the priesthood of Christ. (Catechism of the Catholic Church CCC #1591)
The Sacrament of Holy Orders confers a sacred power for the service of the faithful. The ordained ministers exercise their service for the People of God by teaching, divine worship and pastoral governance. (CCC #1592)
Since the beginning, the ordained ministry has been conferred and exercised in three degrees: bishops, presbyters (priests), and deacons. (CCC #1593)
The sacrament of Holy Orders is conferred by the laying on of hands followed by a solemn prayer of consecration asking God to grant the ordinand the graces of the Holy Spirit required for his ministry. (CCC #1597)
You can learn about the men who are preparing for ordination by visiting the website of Holy Spirit Seminary in Brisbane. LINK