Iestyn studied the Art and Techniques of Glassmaking at Stourbridge College of Art, the UK’s industrial glassmaking heartland, and was invited to attend the Royal College of Art on placement. On graduating in 1985 he joined Stuart Crystal, becoming the first colour designer in the company’s 100 year history.
Since then he has taught hot glass design at Wolverhampton University, established the hot glass studio at Broadfield House Glass Museum under the name Osiris Glass, and in 1993 teamed up with his wife Bev to found his own studio, Blowzone. Their glass art pieces have been sold in more than 600 art galleries across the world.