PPAB members

Photo of Melissa Kirr
Melissa Kirr
Chair
Melissa Kirr is the Senior Programs Director of Sustainability at Walking Mountains Science Center in Avon, CO. She currently works at a local, regional and global level on a variety of sustainability initiatives. In her role at Walking Mountains, she is responsible for the oversight of sustainability-focused programs and projects that include Energy, Climate Action, Actively Green Sustainable Business Training and Certification, Waste Diversion and Zero Waste programs, and Mountain IDEAL Sustainable Destination. She has spent the past 17 years working in the non-profit sector, specifically the environmental and sustainability realms. She holds degrees in Forest Resource Management from Penn State University and the University of Montana. She also volunteers her time to food equity projects, serves on the board of Cloud City Conservation Center, and has spent the last five years serving as a PPAB Assistance Committee member.
Photo of Susan Williams
Susan Williams
Vice-Chair
Ms. Williams is the Principal of Pro Rolloff, LLC in Denver. In this capacity, her 100% women-owned company provides construction waste management solutions for the General Contractor industry in Metro Denver. Ms. Williams brings ten years of experience in LEED waste management, C&D diversion, construction logistics, and hauling operations management to the PPAB. She has actively participated with the Association of General Contractors and the Colorado Association for Recycling. Her goal is to help the expansion of businesses that will process C&D waste materials for future use and reuse.
Marguerite Harden
Marguerite Harden
Marguerite Harden is the Local Resiliency Manager at the Colorado Resiliency Office within the Colorado Department of Local Affairs. Prior to her current role, she spent over a decade working in climate change mitigation and adaptation as a consultant and nonprofit founder and director. She holds a Master of Environmental Management degree from the Yale School of the Environment. Marguerite crewed on a 15-day sail that went through the Pacific Garbage Patch in 2012. She is a hobbyist potter and outdoor enthusiast.
Photo of Doug Hargrave
Doug Hargrave
Doug Hargrave is the President of Iconergy, an energy management and sustainability firm that is based in Denver with additional offices in Boulder and Chicago. Doug has over 25 years of resource conservation, renewable energy, and water and energy efficiency experience with the vast majority of those years dedicated to designing and constructing better buildings. Through his work on public policy, government and utility programs, as well as individual projects, Doug has experience in all facets of energy management and sustainability as it applies to the commercial and industrial sectors.
Photo of Julie Hendricksen
Julie Hendricksen
A licensed Landscape Architect with 20 years of experience in residential, commercial and community master planning. Julie brings a wide range of experience including design-build, staff management and strong connections in the industry. Julie is involved with food equity and as an avid beekeeper, supporting pollinator habitat.
Photo of Laurie Johnson
Laurie Johnson
Laurie Johnson is the Chief Operating Officer, Recycling for 5280 Waste Solutions. 5280 is a hauling and C&D recycling company that captures C&D material and secures markets for these materials in Colorado. Previously, Laurie served as the executive director for Recycle Colorado and VP of Client Services for Recyclebank, and she owned a distribution business in Phoenix for eight years. Laurie holds a Bachelor’s degree in Urban Affairs from Cal State Northridge and an MBA in Sustainable Business from Antioch University.
Photo of Byron Kominek

Byron Kominek
Byron Kominek is the owner and manager of Jack's Solar Garden, a 1.2 MW agrivoltaics community solar garden in Boulder County. He is a former U.S. diplomat having served with the U.S. Agency for International Development on projects related to forestry and wildlife conservation in southern Africa. He has over 12 years of experience working in international development related to natural resource management and speaks French and Portuguese. He holds a M.S. in Environmental Engineering from the University of North Carolina. Byron also through-hiked the Appalachian Trail with his dog in 2016 and has a penchant for dry-cured meats.

Briana Rothrock
Briana Rothrock
Briana Rothrock is an Environmental Health Specialist with El Paso County Public Health and a current resident of Pueblo. Sha has been working in local government for almost 5 years and is an expert in food safety. Briana received her Bachelor of Science degree from Penn State University in Nutritional Sciences and is passionate about reducing food waste, as well as localizing the food supply to increase the nutritional value of our food while decreasing pollution.
Aaron Watson
Aaron Watson
Aaron serves as the Board Chair for the International Dark-sky Association - Colorado chapter, and is the Enrollment and Admissions Specialist at Solar Energy International in Paonia, Colorado. Prior to these roles in solar energy education and nocturnal environment conservation, he worked as a climate scientist, measuring atmospheric greenhouse gases for the National Oceanic and Atmospheric Administration (NOAA). He holds a degree in Engineering Physics from the University of Colorado at Boulder and is a certified Holistic Nutritionist and Health and Wellness Coach. He loves spending time in nature, especially under Colorado’s dark and starry night skies.
Photo of Rachel Wilson-Roussel

Rachel Roussel-Diamond
Rachel Roussel-Diamond is the Sustainability Unit Manager at the Colorado Department of Public Health and Environment and oversees a variety of cross-media, voluntary environmental programs including the department’s recycling grant and rebate programs. She was first appointed by Governor Hickenlooper in 2015 to represent the department on the Pollution Prevention Advisory Board. She is also a founding member of the Front Range Waste Diversion Enterprise Board of Directors.