The second of two Gensler-designed office buildings on the Anadarko campus in The Woodlands, Hackett Tower will consolidate 1,500 Anadarko Petroleum employees. Challenges in designing the 31-story tower included accommodating the building and parking on a constricted site, while developing a design that both complements the adjacent Allison Tower but has a distinct identity from it. The footprint is concave, providing greater efficiency in the tight space, in contrast to the original building’s convex plan. Included are a café, fitness center, conference center and a bridge that connects the two structures.