Lorrie Rossiter, Chair
Erth Products, Inc.
Email

Lorrie Rossiter has over 21 years of experience with biosolids management programs and compost facilities in various capacities such as Compliance Director, Technical Services Director, and Public Relations Director. Lorrie is a Certified Compost Operations Manager (CCOM™) through the U.S. Composting Council. She has been a CREF Trustee since 2011.

Charles D. Duprey, Vice Chair
Naturcycle LLC
Email

Charles Duprey is the founder and president of Naturcycle LLC, a firm focused on the sales and marketing of compost and engineered soils, providing material for landscapers, construction projects, and retail outlets. He also served as Vice Chair of the USCC Market Development Committee, and currently serves on the Seal of Testing Assurance Advisory Committee.

Jeff Ziegenbein, Treasurer
Waste Management
Email

Jeff is the Senior Manager, Organics for Waste Management in California. He is President of the California Association of Compost Producers and has been recycling organics in the western U.S. for over 30 years. He has served as Project Manager for the Inland Empire Regional Composting Authority, operating the largest fully-enclosed composting facility in the country.

Monica Ozores-Hampton, Ph.D., Secretary
TerraNutri, LLC
Email

Dr. Hampton obtained her B.S. in Horticulture from Universidad Católica de Chile, Chile; her M.S in Biological Science from Florida International University, Miami, FL; and her Ph.D. in Horticultural Sciences from the University of Florida, Gainesville, FL. Currently, she is the founder and CEO of TerraNutri, LLC., a consulting company that specializes in research on composting/compost and business development in agriculture.

Ginny Black
Black Gold Recycling, LLC
Email

Ginny has been a trustee since 2010. She also serves on Minnesota Composting Council (MNCC) Board of Directors. Ginny retired from the Minnesota Pollution Control Agency (MPCA) where she worked as a technical staff person assisting in setting up recycling and composting programs throughout the state.

Andrew Carpenter
Northern Tilth, LLC
Email

Andrew is a certified soil scientist, certified crop advisor and certified nutrient management planning specialist and has extensive experience in research, planning and handling technical issues related to the reuse of organic residuals. He founded Northern Tilth, LLC an environmental consulting firm focusing on organic waste management and building soil health, in 2003.

Kate Kurtz
City of Seattle, Seattle Public Utilities
Email

Kate is a soil scientist with nearly 20 years of experience working with compost, biosolids, and other organics as tools to improve soil function, sequester carbon, and support a circular food economy. She serves as the organics program lead for Seattle Public Utilities in addition to managing the Utility’s natural yard care programming and supporting green stormwater infrastructure projects.

Tim O'Neill
Engineered Compost Systems
Email

Tim is founder of ECS and has worked as an engineer, researcher, and innovator in the composting industry for 27 years. He also teaches Compost Operations Training classes on facility design and odor management.

Rebecca Ryals, Ph.D.
University of California, Merced
Email

Becca is an Associate Professor of Agroecology at the University of California, Merced. Her research program focuses on ecosystem-based climate solutions, particularly in agricultural and sanitation contexts. A major research theme is the capture, transformation, and beneficial reuse of organic wastes as compost and other organic amendments to increase soil carbon, improve soil health, and contribute to a more productive and just food system.