Although UMass Dartmouth's Science and Engineering Building has long been viewed as an architectural treasure, its aging interior and structure have presented some challenges to users nearly 50 years after it opened. This talk examines Ellenzweig's extensive retrofitting of the UMass Dartmouth SENG building for accessibility, a new envelope, updated MEP, and fire-safety measures. After looking at the design phase and interactions with the Mass Historic Commission, the talk ends with an examination of the replacement of windows in the building.