His areas of interest include green roof and living wall technology, sustainable site design, planning and construction. Professor Dvorak was previously in professional practice in Chicago, Illinois where he was project manager for the Chicago City Hall Green Roof Pilot Project and a member of the Green Roof Task Force for the ASLA National Headquarters green roof in Washington, D.C. At Texas A&M, Professor Dvorak established the Interdisciplinary Green Roof Research Group in 2009 where he is collaborating on green roof and living wall research with faculty and students on campus. Professor Dvorak is a member of the Green Roofs for Healthy Cities Research Committee, Advisory Editorial Board Member for the Journal of Living Architecture, and is widely published on green roof technology.