Mouillierat signed a one-year, two-way contract with the Penguins on Wednesday. Mouillierat broke through to the NHL for the first time last season, skating in six games for the Islanders and recording a goal and assist. The 27-year-old will likely receive the opportunity to compete for a fourth-line role with the Penguins in training camp, but it wouldn't be a surprise if he spent most of his time with the team's AHL affiliate at Scranton/Wilkes-Barre.