The Green Square Complex includes the Museum of Natural Sciences, Nature Research Center, and offices for state workers. This complex has become a key tourist and visitor destination in downtown Raleigh. The facility includes a 172,000 square foot office building for the Department of Environment and Natural Resources, a 79,400 square foot Nature Research Center, and a connecting skywalk to the Museum of Natural Sciences and Bicentennial Mall in downtown Raleigh. The complex received LEED Silver certification.

TA provided room acoustics, sound isolation, and mechanical noise and vibration consulting services for the project. TA also designed the audiovisual systems, paging systems, sound masking systems, and the radio and television studios for the facility.