To continue to improve the quality of care for their patients, the Cancer Treatment Centers of America retained Gewalt Hamilton Associates, Inc. (GHA) to help facilitate a facility expansion at their Zion, Illinois location. Improvements included a new multi-story Patient Pavilion, Gamma Knife (surgery) addition, a new courtyard, modifications to various building entrances, parking lot modifications, and various utility improvements (both on and off site) associated with the building expansions.

In addition, GHA also provided land surveying services in support of various other projects at the facility, including the Operations Center, Inpatient Tower, Atrium/Valet Entrance, East Corridor Addition, and Open Arms Tower.