Our leadership team
At QTS, our Powered by People™ culture drives our innovation, world-class customer service and unparalleled operational maturity.
Tag Greason is the Co-Chief Executive Officer of QTS, a digital infrastructure leader in designing, building and operating sustainable data centers with 75 data centers in operation or under development across the United States and Europe. QTS provides mission critical infrastructure solutions to Fortune 1000 enterprises, government agencies and the largest technology companies in the world, with an annual leasing revenue of more than $3 billion and total contracted power capacity eclipsing 3 gigawatts.
In collaboration with Co-Chief Executive Officer David Robey, Tag oversees all aspects of QTS in service to its people, customers and communities. He brings 25 years of industry experience driving business growth and value creation and developing deep customer relationships. Tag is recognized for his business acumen, strategic mindset and visionary leadership.
Tag joined QTS in 2011 and most recently served as Chief Growth Officer, leading all external activities, customer engagement and European expansion. Prior to QTS, he was the Executive Vice President for Current Analysis, Inc. and Vice President of Global Services at Savvis Communications, Inc.
He has a storied background in public service. Tag served in both the United States Army and the Virginia Army National Guard. In 2009, Tag was elected to the Virginia House of Delegates and served in the role for eight years. During his tenure, he was appointed to the House committees on Appropriations, Education, Finance, and Science and Technology and was selected as one of eight conferees responsible for negotiating the Commonwealth’s budget. In this role, Tag consistently balanced the state’s budget with a focus on both strategic growth, contingency planning, and problem solving. In July 2026, Tag was appointed to the U.S. Department of Energy’s Secretary of Energy Advisory Board (SEAB) where he provides strategic guidance to the Secretary of Energy on issues shaping the future of American energy, science, technology and innovation. In this role, Tag contributes industry expertise to help advance and strengthen U.S. energy leadership.
As a veteran, he is committed to championing military support organizations, including Stop Soldier Suicide. Tag serves as the Vice Chair of E3: Elevate Early Education, an organization that creates innovative initiatives to give children access to high-quality education for their first eight years. He is also dedicated to advocating for kids with autism spectrum disorder.
He earned an M.B.A. from George Mason University and a Bachelor of Science degree in systems engineering from the United States Military Academy at West Point.
David Robey is the Co-Chief Executive Officer of QTS, a digital infrastructure leader in designing, building and operating sustainable data centers with 75 data centers in operation or under development across the United States and Europe. QTS provides mission critical infrastructure solutions to Fortune 1000 enterprises, government agencies, and the largest technology companies in the world, with an annual leasing revenue of more than $3 billion and total contracted power capacity eclipsing 3 gigawatts.
In collaboration with Co-Chief Executive Officer Tag Greason, David oversees all aspects of QTS in service to its people, customers and communities. He brings 30 years of industry experience in critical environment engineering, facilities and operations management, and technology development. He is recognized for his authentic servant leadership, genuine care for people and customer service, and unwavering commitment to quality and excellence.
David joined QTS in 2010 and most recently served as Chief Operating Officer, overseeing all aspects of development and facility operations, supporting customer delivery while maintaining operational excellence. Prior to QTS, David held multiple technology leadership roles at Infineon/Qimonda, a global semiconductor manufacturing company.
David is committed to upholding and living out QTS’s core values, including our focus on faith, family and community. He is passionate about causes dedicated to helping children and veterans and their families. This commitment is consistent with QTS’s culture of service, which emphasizes making a meaningful impact in the communities we serve.
David holds a Bachelor of Science degree in physics from Missouri State University.
Barry Clegg joined QTS in June 2024 and serves as Chief Safety and Infrastructure Officer. Barry oversees Global Utilities Development & Operations, Global Environmental, Health and Safety (EHS), Global Quality and U.S. Procurement. He drives organizational and operational resiliency in support of Property Development’s growth and continuous improvement in QTS’s safety culture. Before his current role, Barry served as Chief Development Officer, responsible for all pre-development, development and substation activities.
Prior to QTS, Barry was President of Operations for Black & Veatch, focused on global operations, strategic priorities in the market sector and solutions leadership. During his tenure at Black & Veatch, Barry also served as project director and in various management roles within development.
Barry earned a Master’s degree from Kansas State University and a Bachelor’s degree from MidAmerica Nazarene University.
Stephen Douglas joined QTS in 2015 and serves as Chief Financial Officer. He leads the company’s financial and capital markets strategy, supporting its rapid growth and long-term value creation. Stephen brings more than 20 years of experience in financial services and capital markets.
Prior to QTS, Stephen served as Equity Research Vice President at Bank of America focused specifically on the digital infrastructure sector.
Chris Gandolfo joined QTS in 2026 and serves as the company’s Chief Commercial Officer. Chris aligns strategy, sales and go‑to‑market execution to drive sustainable growth and long‑term customer value and oversees the Sales and Brand, Marketing & Communications teams.
He has more than 30 years of experience in sales leadership, with deep expertise across enterprise technology, cloud infrastructure and AI-driven platforms. Prior to QTS, Chris served as Executive Vice President at Oracle, where he led North America Oracle Cloud Infrastructure (OCI) Sales and Global AI Infrastructure, partnering with organizations to adopt and scale critical cloud and AI capabilities while strengthening go-to-market strategy across regions and industries.
Chris earned a Master of Business Administration from the UCLA Anderson School of Management and a Bachelor of Science degree in Economics from Vanderbilt University.
Ryan Hunter joined QTS in 2017 and serves as Chief Operations Officer. Ryan oversees all Development, Design, Engineering and Facility Operations for the U.S. and Europe. In addition, he is responsible for Europe Pre-Development and Procurement. Since 2023, Ryan served as EVP, Facilities Operations, driving all infrastructure and operations of QTS facilities and ensuring reliability, efficiency and safety, and before that he was VP, Facilities Operations.
Ryan brings 25 years of experience in mission critical operations to his role at QTS. Prior to QTS, Ryan was Director, Facilities Support at vXchnge where he was responsible for the maintenance, operations and overall management of the company’s facilities. He also served in facilities management roles at Equinix and Switch and Data.
Ryan served as Leading Petty Officer, Reactor Electrical Division in the United States Navy for eight years and completed Naval Nuclear Power School as an Operator and Electrician during his service.
Madison Williams joined QTS in 2013 and serves as Chief Investment Officer. Madison has more than 20 years of real estate investment experience. Madison oversees the U.S. & European Investment, Real Estate and Site selection teams, along with U.S. Pre-Development and Development Capital management. He structures asset level leasing, financing and management decisions and drives all major lease and expansion projects from a capital perspective. Since 2019, Madison served as Executive Vice President of Real Estate and Investments at QTS.
Prior to QTS, Madison worked in investment real estate at a number of Atlanta-based real estate capital markets and development firms including most recently Patterson Real Estate Advisory Group.
Madison earned an M.B.A. from the Goizueta Business School at Emory University and a Bachelor of Business Administration degree from the University of Georgia.
Theo Yedinsky joined QTS in 2026 and serves as the company’s Chief External Affairs Officer. He leads the Government Relations, Economic Development, Community Engagement and Philanthropy teams under a unified strategy to support QTS’s expansion and strengthen long-term impact.
Prior to QTS, Theo served as Vice President of Public Policy at Airbnb where he oversaw global regulatory strategy, government relations, advocacy campaigns and policy development. He has more than 20 years of experience and brings a deep expertise leading public policy, regulatory and communications efforts.
Theo earned a Master of Political Science from American University and a Bachelor of Arts in U.S. History from Connecticut College.
