She was one of several women promoted by Trump into prominent positions in his company. Trump surprised the male-dominated construction industry when he chose Res to supervise the building of Trump Tower. The author of All Alone on the 68 th Floor: How One Woman Changed the Face of Construction, Res worked with Trump on some of his biggest projects, including the construction of Trump Tower and the renovation of New York’s Plaza Hotel. Barbara Res was hired as the Trump Organization’s head of construction in the 1980s, and became one of his closest advisers before leaving more than a decade later.