SEATTLE--(BUSINESS WIRE)--Optimum Energy is pleased to announce senior level leadership additions to better serve clients and business partners. Larry Stapleton joins Optimum Energy as Vice President, Sales & Marketing from Ballard Power Systems, where he had overall revenue responsibility for fuel cell products and professional services and he was President of the U.S. based subsidiary, Ballard Fuel Cells Systems. Prior to Ballard Power, Stapleton led worldwide sales & marketing for th