QTS Realty Trust announced the appointment of Joan A. Dempsey to its Board of Directors as a new independent director, effective immediately.   Ms. Dempsey brings over 35 years of consulting and operational experience, primarily working with federal government entities. Ms. Dempsey currently serves as Senior Executive Advisor to the Booz Allen Hamilton Chief Executive Officer. Previously, she served as Executive Vice President and Senior Partner at Booz Allen Hamilton for 12 years where she led the company's operations and strategy within the defense, homeland security and intelligence sectors. Ms. Dempsey's experience, together with existing Board members Peter Marino and Wayne Rehberger, both of whom bring expertise and operating experience within the federal vertical, further demonstrates company's continued focus and momentum in providing highly secure data center solutions for federal government customers.