Photo of Stephanie Horii

Stephanie Horii


Stephanie is an Associate at the Consensus Building Institute, with a combined eleven years of experience in facilitation services and environmental science and management issues. She has extensive proficiency with organizational and project management, logistics planning, multi-party facilitation, and collaborative problem-solving. Prior to joining CBI, Stephanie worked as an Associate Facilitator at the Center for Collaborative Policy at Sacramento State University, Sacramento. She has also provided over eight years of research support for various marine coastal organizations working on the West Coast and internationally.

Recently Stephanie has been involved with the implementation of California’s Sustainable Groundwater Management Act, most notably providing facilitation and planning support for statewide public outreach and engagement. She also served as the program management and facilitation lead for the California Biodiversity Council, to improve coordination and collaborative relationships among various federal, state, and local agencies and organizations.

Areas of Focus

Stephanie provides facilitation and mediation services to foster collaboration and build consensus among diverse perspectives and backgrounds. Her work touches upon a wide range of policy issues, including water, natural and cultural resources, climate adaptation, renewable energy, environmental health, agriculture, and land-use planning and management.

Exemplary Projects

  • CA Sustainable Groundwater Management Program
  • CA Biodiversity Council
  • CA Complete Count, Census 2020
  • South Bay Salt Ponds Restoration Project
  • Implementation of CA Executive Order B-37-16 on Water Conservation and Water Use Efficiency
  • Santa Clara Valley Water District One Water Plan
  • Department of Pesticide Regulation Pest Management Advisory Committee
  • Central Valley Landscape Conservation Project
  • CA Transportation Plan 2040 Public Outreach and Report Development
  • Altamont Pass Wind Resource Area Scientific Review Committee
  • Napa County Groundwater Resources Advisory Committee
  • Rim Fire Technical Workshops


The following is a partial list of clients:

Federal Agencies

  • U.S. Bureau of Land Management
  • U.S. Forest Service, Region 5
  • U.S. Fish and Wildlife Service

State Agencies

  • CA Department of Food & Agriculture
  • CA Department of Pesticide Regulation
  • CA Department of Water Resources
  • CA Department of Transportation
  • CA Governor’s Office of Planning & Research
  • CA Natural Resources Agency
  • CA State Coastal Conservancy
  • CA State Water Resources Control Board
  • CA State University, Sacramento
  • Sierra Nevada Conservancy

Local Municipalities

  • Santa Clara Valley Water District, CA
  • Alameda County, CA
  • Napa County Flood Control and Water Conservation District, CA
  • Sonoma County Water Agency, CA

Nonprofit Organizations

  • Sonoma Land Trust

Education and Affiliations

Stephanie holds a masters degree in environmental science and management from the Donald Bren School of Environmental & Science Management. She holds a B.S. in aquatic biology from the University of California, Santa Barbara.

Books and Articles

M.E. DuPraw, S. Di Vittorio, D. Ceppos, M.D. Wylie, M. Kopell, S. Lucero, T. Carlone, M. Meyer, and S. Horii. 2017. Groundwater Sustainability Plans: California’s Newly-Formed Groundwater Sustainability Agencies – The Rewards of Optimizing Effective Coordination and Collaboration. The Water Report: Issue 162, August.