Advisory Council

Darren Greve

Darren Greve is the Director of Transferable Development Rights Programs for King County, Washington, and a former Research Associate at Solimar Research Group. Darren holds a M.A. in Environmental Science & Management (2005) from the Bren School at UC Santa Barbara and a B.S. in Chemistry from the Colorado College (1997). At Solimar he devised innovative TDR analytical tools and helped create and revise programs in Santa Barbara County, California; South Lake Tahoe, California; and Gallatin County, Montana. In addition, Darren devised rigorous economic analysis methods which are now an integral piece of Solimar's Infill Estimation suite of services.

Erik Kancler

Erik Kancler is Executive Director of Central Oregon LandWatch and a former Research Associate at Solimar. He holds an M.A. in Geography from the University of California at Santa Barbara, where he also did postgraduate work on climate change. While at Solimar, Erik focused on issues related to regional land use planning, "smart growth," and natural resources and open space protection in the West. As a journalist, he has written for California Planning & Development Report, the Ventura County Reporter, Mother Jones, the Source Weekly in Bend, and Planetizen (

Matthew A. Cahn

Matthew A. Cahn, is Director of the Center for Southern California Studies and a professor of public policy at California tate University, Northridge. He is a specialist in environmental policy issues and a resident of Ventura. Professor Cahn is the author of several books, including Environmental Deceptions, Thinking About The Environment, and the forthcoming Rethinking California: Politics and Policy in the Golden State.

Ryan Aubry

Ryan Aubry is currently an infill developer with The Angeles Group in Los Angeles. Previously he was a project manager and research associate at Solimar's Ventura office, where he took the lead in creating Solimar's infill development potential methodology. Ryan holds an Master's in Real Estate Development from the University of Southern California (2007) and a M.A. in Geography (2004) from UC Santa Barbara. Ryan's research focus while studying under Dr. Keith Clarke at UCSB was utilizing Geographic Information Systems for urban planning applications. At Solimar Ryan has focused on using GIS to identify opportunities for infill development in urban areas. He has worked closely with The City of Los Angeles, The County of Los Angeles, The Los Angeles Community Redevelopment Agency as well as private developers in applying and refining this methodology.

Christopher Williamson, AICP, Ph.D.

Christopher Williamson, PhD, AICP is currently a Senior Planner for the City of Oxnard, California, with responsibility for the 2030 General Plan Update and 2014 Housing Element. He previously was VP of Research for Solimar Research Group, working with author and consultant Bill Fulton on land use policy research that focused on voter-controlled growth management and demographic trends (clients included California Dept. of Transportation, Brookings Institution, Robert Wood Johnson Foundation, Smart Growth America, U.S. EPA, CA Local Government Commission, The Reason Institute, The Nature Conservancy, Los Angeles City and County, and the Southern California Association of Governments). Chris has written for Planning and on why the planning profession needs to better respect the slow or no-growth sentiments of some voters and not consider them "in need of education." His career also includes working for the U.S. Census Bureau and the City of Long Beach. Chris holds a PhD in Planning and Policy Analysis from the University of Southern California, a Masters in Planning from the University of Virginia, and a BS in Geography from Penn State. He is a faculty member at USC, Lecturer at CSU Channel Islands, and a Fulbright Scholar.

Rolf Pendall

Rolf Pendall is a city planning professor at Cornell University who has conducted extensive research on land-use policy, sprawl, and affordable housing policy and programs throughout the nation. He holds a PhD from the University of California at Berkeley and master's degrees in Planning and Latin American Studies from the University of Texas at Austin. More information about Pendall's work is available at