This is Rolf Purzer's second appearance on BTN's Most Influential list, the first being in 2018. It's also likely his last, as Purzer, who has been with ATPCO since 1996 and took over as president and CEO in 2017, is retiring at year-end. He'll finish his term with a bang, as 2020 was a year far different than any other, even for someone with nearly 40 years of industry experience.