He is the creative director and author of Free Association Design and a founding member of The Dredge Research Collaborative. His writings have appeared in publications such as Bracket [Goes Soft], Making the Geologic Now (Punctum Books, 2013), MONU, the Journal of Landscape Architecture, Landscape Architecture Frontiers, and Landscape Architecture magazine. Milligan’s research operates in the fields of applied ecology, infrastructure studies, and the development of theoretical and material frameworks for encountering accelerated processes of landscape change. This research finds design expression in the prototyping of responsive and regenerative forms of infrastructure.