The Board of Directors is made up of passionate volunteers who work in all areas of composting. Please take a moment to learn about them and reach out if you have any questions.

To learn more about the NCCC Board Member Roles and Responsibilities, please view this document.

Committee Leadership

Executive: Muriel Williman | Gary Bilbro | Kate Sullivan
Advisory: Carl Sigel  | Gary Bilbro
Outreach & Education: Bianca Howard
Communications & Treasury:  Kate Sullivan
NC Network:  Julie Moore
Compost Operations Training Course:  Muriel Williman | Gary Gittere

To become involved in one of the committees, please let us know, you do not need to be a Board member to do so. Please email us at

Muriel Williman, Board President
Email  |  LinkedIn

Muriel Williman has been a Solid Waste professional for 25 years, focusing on waste reduction and material management through recycling and composting practices and markets.  She worked for 18 years in Orange County NC, leading the state with 64% waste reduction through comprehensive waste reduction programs and communications, especially composting: indoors and out, for events, in businesses, local government, and commercial collections.  She has influenced local and regional programs, practices and policy to incorporate food waste reduction and composting strategies. She is now Senior Assistant Solid Waste Manager for the City of Durham, NC where she oversees the daily operation of the City’s Solid Waste Disposal and Recycling Center which holds a regional Transfer Station, Convenience Center, and Type 1 composting facility.

Gary Gittere, Past Board President
Email  |  LinkedIn

Gary Gittere heads sales and marketing for McGill Premium Compost Products, drawing from over 15 years of regional and national sales managerial & marketing expertise to expand McGill’s 20-year competency.  Gary is charged with leading McGill’s compost market development team as the company prepares to open additional industrial-scale compost manufacturing facilities.  He has focused on the development and presentation of technical training programs for professionals in the turfgrass, landscaping, agriculture, and environmental industries, including engineers and specification writers tasked with the development and management of programs for stormwater and erosion control in the NC, VA, and SC markets.

Kate Sullivan, Board Treasurer

Kate Sullivan joined McGill Environmental in 2014. She worked in Business Development for two years, where she was responsible for securing and managing incoming feedstocks and amendments. When a position opened on McGill’s Compost Sales Team, Kate took the opportunity to learn about compost use and application. For the next two years she was a compost sales representative for customers in Virginia as well as part of North Carolina. Recently, Kate accepted a position as Project Manager at McGill where she will work to expand McGill’s footprint through building new facilities. In her spare time, Kate enjoys hiking and volunteering with Triangle Beagle Rescue.

Margaret Ross, Board Member

Margaret Ross currently serves as the Eastern Area Specialized Poultry Agent for 33 counties in North Carolina through NC State Extension. Margaret started her career in Extension straight out of college in 2010 as the Livestock agent for Craven and Jones Counties where she served for about 5.5 years, then made the transition to her current position. She graduated from NC State University in 2010 with a B.S. in Animal Science and again in 2014, while working for NC State Extension, with her Masters in Animal Science also at NC State University. She is currently taking classes now toward her Doctorate degree in Animal Science at NC State University where she plans to do some composting work as part of her research. She became interested in mass mortality composting after Hurricanes Matthew and Florence and will attend the Large Animal Carcass Management Training in Maine this summer where she hopes to further her composting skills to help farmers in her area better prepare for the next natural disaster or disease event.

Gary Bilbro, Board Secretary
Email  |  LinkedIn

Gary Bilbro is a recycling professional with experience working with organics diversion, composting, waste-to-energy, curbside recycling, construction & demolition recycling and consulting with public, private and non-profit associations within the industry.  Gary currently works for EcoSafe Zero Waste, which provides programs for waste generators to divert organics from their waste stream with a goal of producing contaminate free material for composters and making zero waste to landfill possible.  Gary has worked to enhance the recycling of fats, oils and grease, industrial sludges and waste water.  The diversion of waste to landfill is his passion. He is working on his first book on the subject entitled “How Recycling Changed the World”. Gary lives in North Carolina with his wife and two dogs, “the kids”.  He enjoys reading, writing, walking and Golf.  His ultimate goal: “To bring life back to our soils while ending the need for landfills”.

Carl Sigel, Board Member
Email  |  LinkedIn

Carl Sigel spent his professional life in the pharmaceutical industry. Now retired, he is committed to working with organizations that focus on addressing climate change and increasing food security, NC Interfaith Power & Light, Environmental Ministry Committee, Episcopal Diocese of NC, Capital Area Food Network, and NC Audubon. At Church or the Nativity, Raleigh, Carl leads a project, Becoming the Good Soil, Bearing the Fruit That Will Last, which is based on the proven concept of “carbon farming”. Climate change can be slowed by increasing soil fertility through applying compost to the land. Greater soil fertility leads to increased plant growth, more photosynthesis, and greater removal of carbon dioxide from the air.

Robert Satterfield, Board Member

Since starting with Atlas Organics in November of 2018 Robert Satterfield has moved from being a compost facility operator to a successful salesperson covering markets in both NC and FL. As an early member of the Durham team, Robert established a foundation of manufacturing knowledge including heavy equipment safety and maintenance, feedstock mixtures, temperature monitoring, and finished product processing. In 2019 Robert transferred this skillset into compost sales as he continued to develop brand awareness and usage across agriculture, professional landscape and home gardening sectors in the Triangle region. In addition to serving NC customers he also leads sales in the FL market working to support Atlas Organics’ Indian River County Facility in Vero Beach, FL.

Karl Warkomski, Board Member
Email |  LinkedIn

Karl Warkomski has been actively involved in the composting and waste reduction sector since 1994. He is currently the General Manager of the Tar River Trading Post, LLC a Louisburg-based company specializing in bioconversion technologies, composting systems and off-grid supplies. He also teaches workshops on Black Soldier Fly cultivation to help small farmers reduce their chicken and fish feed expenses while additionally diverting food waste from landfills.  Karl manages all aspects of manufacturing, distribution and sales out of the North Carolina office.  He is an avid gardener and holds degrees from University of California, Irvine and University of Southern California.

We thank all the past members of the multiple iterations of this nonprofit organization for their commitments, ideas, and actions to make this a better state for composting!

Founding Members of the North Carolina Composting Council

Frank Franciosi, Rhonda Sherman, and Craig Coker.

Past Board Members of the North Carolina Composting Council

Amy Brooks, Analis Fulghum, Bianca Howard, John Janes, Jim Lanier, Noah Marsh,  Jorge Montezuma PE, Lyndell Pate, Kathryn (Kat) Pohlman, Glen Roberts, Shane Roberts, Brian Rosa, Mike Rowland, Eric Wallace, Ed Wright

Past Members of the Carolina Recycling Association – NC Organics Recycling Council (Prior to 2007)

Frank Franciosi, Rhonda Sherman, Ron Alexander, Cindy Salter, and Tom Glendinning.

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