Lee has over 43 years’ experience in all phases of construction, including mechanical installations, estimating, and project management. He attended University of Illinois in 1973-1974, studying Mechanical Engineering, and then formed R.D. Hahn & Sons, Inc., an MEP contracting company in partnership with his father in 1974. Shortly afterwards he attended Sheet Metal Apprenticeship Academy Local #220, graduating in 1976. In 1980 he worked as the Project Manager for the HVAC and Plumbing scopes during the construction of the Italian and German pavilions at EPCOT, Orlando, Florida.
Lee joined B&I Contractors in 1986 as Assistant Manager for the Sheet Metal department and was soon promoted to Sheet Metal Department Manager in 1995. Most recently, Lee was promoted to Operations Manager in 2011.