Ten years after launching a gallium nitride (GaN) semiconductor company, the two Ottawa-based co-founders of GaN Systems, President Girvan Patterson and CTO John Roberts have announced their retirement. Having achieved their goal of building GaN Systems into the world leading manufacturer of GaN power transistors and supplier to more than 500 customers, serial entrepreneurs Patterson and Roberts will leave their operating roles. Patterson will retain a position on GaN Systems’ Board of Directors, while Roberts will remain available to the company as an emeritus contributor.