After retiring from baseball, Plews worked for cement plants. First, he worked for a Kaiser Permanente plant in Montana, but later, he moved to Colorado, where he worked at one in the Denver area started by former major leaguer Dale Mitchell.
Following his retirement from baseball, Plews pursued a career in the concrete industry. He first held a position at a Kaiser Permanente cement plant in Montana before moving to Colorado and working at a facility founded by Dale Mitchell, another former professional athlete.