Joanna Callahan

Principal
Hess Callahan Grey Group

As Principal of Hess Callahan Grey Group (HCG), Joanna has been active in developing sustainable, award-winning commercial office projects in Seattle, Washington, with a focus on Fremont and the North Lake Union submarket. With deep ties to Seattle, HCG Group has earned a reputation for delivering high quality, distinctive spaces for tenants who value sustainability, innovation, and one-of-a-kind designs. Two of her most recent projects are mass timber, including Northlake Commons, which will be the largest mass timber commercial project in Seattle. Using cross laminated timber (CLT), Northlake Commons is also the first mass timber project designed to accommodate life science space.

Jo’s experience includes legal and development roles over her 10+ years in the real estate business, earning her recognition by the Puget Sound Business Journal Commercial Real Estate Leadership Awards as 2019’s “Up and Coming Developer.” Her projects have been recognized with awards like NAIOP WA Office Development of the Year, NAIOP WA Sustainable Development of the Year, and Architizer A+ Award. Jo holds a B.A. from Yale, a Master of Science from the London School of Economics, and a law degree from the University of Washington.