They will not be judged at this time; they will have already been judged and rewarded at the Judgment Seat of Christ. But they will act as assistants as Jesus Christ judges wicked men and fallen angels. Believers do not face the judgment of condemnation but help administer it (Revelation 2:26, 27; 3:21).  

Do ye know that the saints shall judge the world? and if the world shall be judged by you, are ye unworthy to judge the smallest matters? Know ye not that we shall judge angels? how much more things that pertain to this life? (1Corinthians 6:2, 3).  

knowing the responsibilities God is preparing us for prods us to maturity. We cannot be content to remain spiritual babes, but we must press on toward perfection