His professional credentials include having taught more than 150 workshops for potters in the U. S. , Japan, New Zealand, Australia, England, and Scotland. Most recently he was invited to be a Guest Artist at the Shigaraki Ceramic Cultural Park, in Shigaraki, Japan. He has published more than 60 articles in Ceramics Monthly, The Studio Potter, and Ceramics Art and Perception, among other periodicals. His books, Salt-Glazed Ceramics , and Woodfired Stoneware and Porcelain , are standards in the field.
His work is represented in the following collections, among others:
- Smithsonian Institution, Washington, D. C.
- Shigaraki Ceramic Cultural Park, Shigaraki, Japan.
- Leningrad School of Arts and Industry, Russia.
- Auckland Museum of Art, Auckland, NZ
- Melbourne University, Melbourne, Australia
- Delaware Art Museum, Wilmington.
- Utah State University Museum of Art, Logan.
- Arizona State University, Tempe.
- Alfred University, Alfred, NY
- William Penn Museum, Harrisburg, PA.
- Arrowmont School of Crafts, Gatlinburg, TN.
- Peat Marwick Collection of Contemporary Crafts, Pittsburgh, PA.
He considers his students to be "fellow learners," and attributes to them his ongoing interest in how people use clay to discover that we all have the capacity to express ourselves in original ways.