2025 – Day 1

Stephanie Barger

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Stephanie Barger

Director, Market Transformation & DevelopmentTRUE Zero Waste Certification As director of market transformation & development for the TRUE Zero Waste Certification, Stephanie Barger is responsible for the growth and development of the TRUE program. Barger helped launch TRUE, owned and administered by Green Business Certification Inc. (GBCI) in 2017. GBCI is the premier organization independently … Read more

Christienne de Tournay Birkhahn

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Christienne de Tournay Birkhahn

Chrise is a Zero Waste specialist, educator, & advocate. She is Berkeley’s ZW Commission Vice Chair (former two-time Chair); as Chair, she coordinated and conducted the public outreach/input-gathering efforts instrumental for 2019’s landmark Single-Use Disposable Foodware & Litter Reduction Ordinance passage. She is an instructor for Zero Waste USA’s certification program, assistant project manager for … Read more