Tyrrell Joins Psomas Water Group

Los Angeles, Calif.— Catherine Tyrrell has joined Psomas as director of water quality management. "We are excited to be able to offer our clients the advantage of the scope and depth of Catherine's expertise in water quality and watershed management," said Blake Murrillo, CEO of

Tyrrell has extensive knowledge of California's water quality regulations, stormwater management activities and watershed management approaches. Prior to joining Psomas, she was director of coastal and environmental affairs for Playa Vista. While at Playa Vista, she created a conservancy to oversee operations, monitoring and maintenance of the master-planned community's freshwater marsh system. She also oversaw development and implementation of the freshwater marsh operations and maintenance manual. In addition, Tyrrell was responsible for coastal permitting for transportation and restoration projects within the coastal zone.

Previously, Tyrrell was the assistant executive officer for surface water programs with the Los Angeles Regional Water Quality Control Board. Among other activities, she led the effort with the State Water Resources Control Board and the U.S. Environmental Protection Agency to coordinate health and water quality monitoring statewide. She also led in the development of the stormwater management permit for the region.

Prior to that, she was the executive director of the Santa Monica Bay Restoration Project — one of the first watershed projects in Southern California with a surface water quality focus .

Tyrrell holds a bachelor's degree from of the University of California, Irvine and a master's degree in urban planning from the University of California, Los Angeles. She is a past board member of the Ballona Wetlands Foundation and the past president of the Ballona Wetlands Conservancy. Tyrrell sits on the Planning and Land Use Committee of the Westchester-Playa del Rey Neighborhood Council.

Tyrrell and her husband, who have three grown children, moved to Playa Vista in March.