Before joining B Riley in September 2008, McQuay employed for 10 years as managing director investment banking at A. G. Edwards & Sons, Inc., where he specialized in healthcare, including medical technology, biotechnology and specialty pharmaceuticals. He earlier served as partner and managing director investment banking at Crowell, Weedon & Company, as vice president corporate development at Kerr Group, Inc, as managing director merchant banking at Union Bank of California, as senior vice-president corporate finance at Wedbush Morgan Securities and as vice-president brokerage services at Alexander & Alexander, Inc. McQuay holds an AB in Economics from Princeton University and an MBA from UCLA.

BSD Medical develops, manufactures, markets and services systems to treat cancer and benign diseases using heat therapy as provided by focused radio frequency and microwave energy.