Johns Manville (JM), a global building and specialty products manufacturer, announced leadership changes in two of its businesses. Bob Wamboldt, currently senior vice president and general manager of Roofing Systems, will become senior vice president and general manager of Insulation Systems, and Joe Smith will become senior vice president and general manager of Roofing Systems.

Wamboldt will succeed Fred Stephan, who is leaving Johns Manville for another opportunity.

“Johns Manville is a leader and innovator in the many global markets we serve,” says Mary Rhinehart, chairman, president and CEO. “We are confident Bob and Joe will continue making JM the supplier of choice for our customers, and we are thankful for the service Fred has given JM over the past 12 years.”

Wamboldt joined Johns Manville in 2003 and has held senior leadership positions in the company’s Engineered Products business and in Roofing Systems. He began as strategic accounts manager and later worked as vice president and general manager of Engineered Products North America and as leader for the North American Fibers business in the Engineered Products Group. He has led the Roofing Systems business since 2011. Before joining JM, Wamboldt worked 16 years at PPG with key roles in their Fiber Glass and Coatings divisions. He earned a degree in Chemistry from Lehigh University and is a certified Six Sigma Black Belt.

Smith will assume Wamboldt’s current role in the Roofing Systems business. He has been general manager of Building Insulation since 2012 and has played important roles at JM for more than 28 years. He began his tenure as a roofing sales representative, and in 1998 he moved to Denver as a marketing manager in JM’s Roofing Systems Business. For the next 14 years, he worked in a variety of marketing, product management and roofing services positions. He earned a bachelor’s degree in Management and a master’s degree in Business Administration from St. Leo University.