HGA | 48,089 followers on LinkedIn. Designing purposeful spaces for people and planet | HGA is a national interdisciplinary design firm committed to making a positive, lasting impact for our clients and communities through research-based, holistic solutions. We believe that great design requires a sense of curiosity—forming deep insight into our clients, their contexts, and the human condition. We are a collective of 1,000 architects, engineers, interior designers, planners, researchers, and strategists.