MICHAEL CALLAHAN, RLA
Principal Landscape Architect
Michael is founder and creative director of THRESHOLD. He recently worked closely with Raymond Jungles on the design of Grove at Grand Bay, Apogee South Beach roof garden and the 200m renovation of Bal Harbour Shops. Michael also apprenticed for renowned landscape architect Stephen Stimson in Boston and began his career with the multidisciplinary firm Kimley-Horn and Associates.
Growing up along the Florida Coast, Michael developed an appreciation of his surrounding environment while exploring beaches, tidal lagoons, and freshwater marshes near his home. These experiences combined with his early interest in art and architecture led him to study environmental design. Over time he has developed a passionate interest in how native plant communities, sustainable management practices and local building materials work to create compelling landscape experiences.
Michael is a registered Landscape Architect in the State of Florida. He holds a Master of Landscape Architecture from Iowa State University Collage of Design and a Bachelor of Landscape Architecture from The University of Georgia School of Environmental Design. Michael has also served as a visiting lecturer and critic at Penn State University and Iowa State University.
Christine is the managing partner involved in all aspects of THRESHOLD operations from schematic design through construction implementation. She has apprenticed for renowned landscape architect Stephen Stimson in the design of University of Connecticut, Northeastern University and large scale residential estate projects throughout the northeast and Canada. Christine has instructed design courses at Iowa State University while participating in the Iowa Department of Transportation Living Roadway Program. During which, she has collaborated with many government agencies, business owners and local communities in facilitating design charrettes for implementing landscape interventions.
From the vastness of the Iowa agrarian landscape of her youth to cities lived in and traveled, Christine has learned to appreciate how inherent qualities inform place and how thoughtful design can shape the landscape to reflect and enhance these qualities.
Christine holds a Master of Landscape Architecture from Iowa State University College of Design and a Bachelor of Fine Arts from the University of Iowa School of Art and Art History. Her background also includes experience in hospitality design and management.