GLHN Architecture & Engineers has expanded its Tucson and Phoenix offices with two strategic new hires. Ye Zhang joins the Phoenix office as an electrical engineer and Tony Spence joins the firm as Tucson office as a senior electrical engineer. Zhang brings 12 years of experience to the firm. In addition to serving as an electrical engineer, she will also assist in business development. She has a bachelor of engineering degree from Dalhousie University in Halifax, Nova Scotia, Canada. With more than 30 years of experience, Spence joins the firm from Boeing. He has also worked at KEY Engineering and D&S Consulting Engineers.