In his more than 20-year career as a full-time potter, Diehl has developed both a thriving studio and lifestyle in West Virginia. In 1980, Diehl and his wife, Donna, established Lockbridge Pottery by turning an abandoned country schoolhouse into a ceramic studio and home.
Diehl fires in a wood-salt kiln, which he built (with help from his family) much like the traditional German salt kilns. His great-grandfather worked as a potter in Germany and his grandfather had a studio in New Jersey. His formal ceramic education began at Berea College in Kentucky, where he studied in the college's ceramic apprenticeship program for four years and apprenticed for a year in Germany.