Oak joined Mansfield in 1998 as director of operations at the company's facilities in Perrysville, Ohio. He was promoted to vice president/manufacturing in 2000. Prior to joining the company, he worked for Fullerton Computer Industries and Raytheon Co.
Mansfield's product lines include vitreous china bathroom fixtures; acrylic bath and kitchen fixtures; porcelain-on-steel fixtures; and brass and plastic parts and trim.