Collin finished law school seventh in his class and was invited to be in the Order of the Lytae. While in law school, he was a finalist in a pair of Moot Court competitions, received six CALI Awards for the highest grade in his class, and was a member of the Board of Advocates and Phi Delta Phi Legal Honor Society. Collin also served as Senior Articles Editor of the South Texas Law Review, Editor-in-Chief of the Adelphia Law Journal, Associate Editor of the Corporate Counsel Review, Dean of the E.E. Townes Senate of the Delta Theta Phi legal fraternity, and Treasurer of the Federalist Society.
As an undergraduate, Collin was a member of Omicron Delta Kappa Honor Society, an active member of the Sigma Tau Gamma Fraternity and a Student Government Senator. In junior college, he played two seasons of varsity basketball and was a member of the Trinity Valley Fellowship of Christian Athletes.