Course Instructors

Dr. Christopher Wedding, lead Course Instructor, is Executive in Residence at the Nicholas School of the Environment, and Founder and Managing Partner of IronOak Innovations, a sustainability strategy consulting firm. In addition, he is an investment professional, entrepreneur, start-up advisor, sustainability expert, speaker and author.  He has 15 years of experience in environmental science and management, sustainable business, private equity, angel and seed investing, innovation, entrepreneurship, real estate development, international research and teaching.  His other professional roles include: Co-Founder/Principal of g-bit, a market intelligence software platform for environmental sustainability trends; Director of R&D and Sustainability of Cherokee, an environmentally focused investment company; Adjunct Professor with the University of North Carolina at Chapel Hill’s (UNC) Kenan-Flagler Business School; faculty member with the Institute for Defense and Business, an executive education program for the US military; and a LEED Accredited Professional with the US Green Building Council since 2004. He served as green building advisor for the first two LEED Platinum certified projects in North Carolina and one of the first ten Gold certified LEED for Neighborhood Development projects in the world.  Dr. Wedding holds a PhD from the University of North Carolina-Chapel Hill.

Matthew Arsenault is the Program Manager for the Duke Carbon Offsets Initiative, where he works to help Duke and other institutions meet their climate and energy goals and maintain sustainable operations. He also has significant experience in state policy and legislation, policy analysis, and program administration. He holds a Master of Public Policy from Duke University and a Bachelors in Political Science from Florida State University.

Dorian Bolden is an entrepreneur with a financial services background. He is the founder and owner of Beyu Caffe, a restaurant, bar and live jazz club in downtown Durham. He worked at Bank of America after graduating with his Bachelor’s from Duke, but decided to pursue his dream of opening a restaurant. He worked at numerous coffee shops, bars and restaurants to learn how to run the various components of a restaurant before opening Beyu Caffe. Beyu Caffe has won numerous awards, including being named “Retail Business of the Year” by Downtown Durham Inc. and “Best Place to Hear Jazz in the Triangle.”

Paul Cameron is the City of Durham’s Sustainability and Energy Analyst, based in the General Services Department. Paul leads the City’s Sustainability and Energy Program and implementation of the City’s Sustainability Roadmap. Prior to working for the City of Durham, Paul co-founded and led Brattleboro Climate Protection, a climate and energy program based in the Town of Brattleboro, Vermont, for fourteen years. The program developed and successfully implemented the Town’s Climate Action Plan, among other efforts.

Paul grew up in eastern North Carolina. He holds a Masters in Environmental Studies from Antioch University New England and a Bachelors from Warren Wilson College. Paul is an avid naturalist and teaches a course in Plant Communities of the North Carolina Piedmont.

Dr. Martin Doyle is the Senior Associate Dean for Academic Initiatives, and Professor at the Nicholas School of the Environment. His work is focused on the science and policy of rivers and water in the US.  His first book, The Source (WW Norton, February, 2018), is a history of America’s rivers.  In addition to his role as a professor, Doyle has had several stints in government: in 2015-2016, he moved to the Department of Interior, where he helped establish the Natural Resources Investment Center, an initiative of the Obama Administration to push forward private investment in water infrastructure, enable water marketing, and increase the use of markets and conservation banks for species conservation.  Prior to that, in 2009-2010, he was the inaugural Frederick J. Clarke Scholar at the US Army Corps of Engineers.  During this time, he was located at the Institute for Water Resources and tasked with assisting the Corps with regulatory policy particularly focused on mitigation banking and jurisdiction of ‘waters of the US.’

Over the past 20 years, Doyle’s research has ranged from aging infrastructure and dam removal to emerging environmental markets and impact investing in water.  He is also the director for water policy at the Nicholas Institute for Environmental Policy Solutions, where is a co-organizer and leader of the annual Aspen-Nicholas Water Forum, which brings together some of the world’s foremost thought leaders each year around the future of water. Dr. Doyle holds a PhD from Purdue University.

Jason Elliott is the Assistant Director for Sustainable Duke, where he is responsible for helping Duke meet and maintain its climate neutrality goals. Sustainable Duke is charged with reducing the environmental impact of Duke University, strategic planning for sustainability, educating the campus community regarding sustainability on campus, and developing programs to positively influence campus sustainability behavior and operations. Previously, he served as program coordinator at Duke Carbon Offsets Initiative, maintaining and evaluating carbon offset projects adopted by Duke University. Jason holds a Masters in Environmental Management with an emphasis on Environmental Economics, from Duke University and a Bachelors from Manchester University.

Bertha Johnson is the Director of Budget and Management Services for the City of Durham, NC. She serves as a member of the City’s Executive Leadership team and oversees the development, implementation, and monitoring of the City’s annual operating budget of $390+million. She holds a Master of Public Administration from North Carolina Central University and a Bachelors from Elon University.

Catherine Kastleman serves as a Program Coordinator for Duke University Superfund Research Center. At the Center, Catherine focuses on working with communities who have been impacted by environmental contaminants to help answer and address environmental health concerns. Her expertise includes environmental health and risk assessment, sustainable food systems, program evaluation, and capacity-building for grassroots organizations. Catherine holds a B.A. from Yale University and a Master of Public Health (MPH) degree from Johns Hopkins University. She is a North Carolina native, raised in Chapel Hill.

Bryan Luukinen is a Senior Coordinator at the Duke University Superfund Research Center, and a passionate science communicator with extensive experience in the fields of toxicology, risk assessment, pesticides and agricultural systems, and environmental health. Previous to his work at Duke, he worked with the National Pesticide Information Center, the Environmental Protection Agency (EPA), and the National Institute of Environmental Health Sciences. He holds a Master’s in environmental health science from the University of North Carolina, Chapel Hill, Gillings School of Global Public Health, and a Bachelors from Willamette University.

Dr. Henry McKoy is the Director of Entrepreneurship and Faculty at North Carolina Central University School of Business. Dr. McKoy is a seasoned professional in community and economic development, policy, government, and finance. He served from 2010-2012 in the North Carolina Department of Commerce where he was appointed by the Governor in August 2010 as Assistant Secretary. At Commerce he was the top Community Development official and representative in NC government. His Division oversaw over one billion dollars in investments across hundreds of projects throughout NC in areas of Infrastructure, Housing, and Business. He has worked extensively with federal, state, and local government agencies and officials including Mayors, City Council and County Commissioner members, City and County staff, state representatives and agencies, and Congressional offices.

Before entering state government, Henry was a successful, well-respected, and award-winning business and banking leader with more than 15 years of retail and commercial banking experience, community financial development, charitable and community service, at the local, regional, and national levels. He spent more than a decade as an executive with Central Carolina Bank, National Commerce Financial and Suntrust Bank, being promoted and receiving progressively more responsibility while growing and leading several multibillion dollar divisions.

Since leaving banking in the mid-2000s, Henry has served as founder and Chief Executive of a national consulting and financial advisory firm, working with small, medium & large businesses and organizations with a particular focus on sustainability, energy, energy efficiency, and the environment, in preparing for and identifying capital sources, as well as on operational growth strategy. He is considered a national thought leader in those areas and their connections to community and economic development. Henry has been involved with nearly 200 non-profits since 1993, serving on boards and volunteering at the local, statewide, national, and international level. He holds a Ph.D. in Community Regional Planning from the University of North Carolina at Chapel Hill, and a Masters of Environmental Management from Duke University.

Andre Pettigrew is the Director of the Office of Economic and Workforce Development for the City of Durham, North Carolina. As a senior executive, business strategist and economic development professional, he has more than 15 years of experience developing and managing complex multifaceted organizations, linking clean energy and sustainability to grow the clean economy. He is the former executive director of Clean Economy Solutions, a national non-profit whose mission is to accelerate the growth of sustainability and clean energy in the US. He is an accomplished civic leader, having worked as the executive director of the Office of Economic Development for the City and County of Denver and Vice President of the Boulder Chamber of Commerce. He holds a Bachelors in Economics from the University of California – Los Angeles.

Dr. Danielle Purifoy is a writer, lawyer, and current Carolina Postdoctoral Fellow in the Department of Geography at The University of North Carolina at Chapel Hill. She received her J.D. from Harvard Law School and Ph.D in Environmental Politics and African American Studies from Duke University. Her current research traces the roots of contemporary environmental inequality in the U.S. South, particularly in the development of Black towns and settlements. She is also Managing Editor at Scalawag, a non-profit media organization devoted to Southern politics and culture, and a board member of the North Carolina Environmental Justice Network 

Anthony Scott is the Chief Executive Officer of the Durham Housing Authority, where he works closely with the City of Durham on joint affordable housing goals. He has previously served as Deputy Executive Director of Baltimore Housing, and as CEO of the Richmond Redevelopment and Housing Authority. He holds a Masters in Urban Planning from UCLA.

Dr. Toddi Steelman is the Stanback Dean at the Nicholas School of the Environment. She served five years (2012-2017) as the first permanent Executive Director (Dean) at the School of Environment and Sustainability (SENS), University of Saskatchewan, Saskatoon, Canada.  Prior to her appointment in SENS, she served 11 years on the faculty in the Department of Forestry and Environmental Resources at North Carolina State University (2012-2001) and four years in the Graduate School of Public Affairs at the University of Colorado at Denver (1997-2001). She holds a Ph.D. from Duke University’s Nicholas School of Environment, a Master in Public Affairs from Princeton University and a Bachelor of Arts in Political Sciences and International Studies from West Virginia University.

She served six years as the editor of Policy Sciences, one of the premier journals in her field, where she remains on the International Editorial Board. She is past president of the Society of Policy Scientists. She currently serves on the Board of Directors for the International Association of Wildland Fire as Vice President.

Working at the intersection of science, policy and decision making, her expertise in environmental and natural resource policy is well-recognized nationally and internationally. The author of four books, Steelman has published extensively in peer-reviewed journals, as well as opinion and editorial pieces in Nature, the Globe and Mail, and the Los Angeles Times.

She is best known as a wildfire expert; her research agenda has focused on understanding community responses to wildfire, and how communities and agencies interact for more effective wildfire management.  Steelman is Co-director of the Fire Chasers project at North Carolina State University (

Nicole J. Thompson is the President and CEO of Downtown Durham, Inc., She served previously as Lake County Economic Development Corporation in Leadville, Colorado, and  the community economic development coordinator with the Durham-based N.C. Institute of Minority Economic Development. She holds a Masters in Urban and Regional Planning from the University of North Carolina-Chapel Hill, and a Bachelors in Political Science from the University of Richmond.