Marine Staff Sgt. Erin Rios, Motor Transport Instruction Company, Marine Corps Detachment, checks the schedule of classes on her computer. Rios was recently named TRADOC's Instructor of the Year. - Marine Staff Sgt. Erin Rios, Motor Transport Instruction Company, Marine Corps Detachment, checks the schedule of classes on her computer. Rios was recently named TRADOC's Instructor of the Year.