Dr. Arif Rachman, drg., S.H., M.H., M.M., MTr.Hanla., Sp.Pros., CIQnR., CIQaR., CSCBM., CHRMP., CRMS., CAIA.; Dr. Apt. Drs. Timbul Partogi Haposan Simorangkir, M.Si., C.I.T.