Colorado’s 41st Governor

Bill Ritter, Jr.


Bill Ritter, Jr. is the founder and director of the Center for the New Energy Economy (CNEE) at Colorado State University which launched on February 1, 2011. The Center employs an assistant director, five senior policy advisors, an executive assistant and a team of student researchers.

The Center works directly with governors, legislators, regulators, planners, policymakers, and other decision makers. It provides technical assistance to help officials create the policies and practices that will facilitate America’s transition to a clean-energy economy.

Ritter was elected as Colorado’s 41st governor in 2006, and built consensus to tackle some of the state’s biggest challenges. During his four-year term, Ritter established Colorado as a national and international leader in clean energy, by building a new energy economy. He signed 57 new energy bills into law, including a 30% Renewable Portfolio Standard and a Clean Air Clean Jobs Act that replaced nearly a gigawatt of coal-fired generation with natural gas. In total, the Colorado new energy economy created thousands of new jobs.

Ritter is a member of the board of the directors of the Energy Foundation and a senior fellow and member of the board of directors of the Advanced Energy Economy Institute. Ritter earned his bachelor’s degree in political science from Colorado State University (1978) and his law degree from the University of Colorado (1981). With his wife Jeannie, he operated a food distribution and nutrition center in Zambia. He then served as Denver’s district attorney from 1993 to January 2005.

The Ritters have four children: August, Abe, Sam, and Tally.

Assistant Director

Suzanne Tegen


Suzanne Tegen is the Assistant Director of the Center for the New Energy Economy with expertise in energy economics and policy, and a Ph.D. in Energy Policy from the University of Colorado. Suzanne came to CNEE from the National Renewable Energy Laboratory (NREL) where she spent 14 years as an energy analyst, researcher, and the manager of the Wind and Water Technology, Engineering, and Deployment group.

She has authored or co-authored over 50 reports, such as those focused on domestic renewable energy jobs, stakeholder engagement, and the levelized cost of wind energy. She co-wrote a report on clean energy policies for the Clean Energy Ministerial’s Clean Energy Solutions Center and received the Ministerial’s C3E Mid-career award in 2016. She represents the United States in the International Energy Agency’s wind energy social acceptance task and has made countless presentations on responsible renewable energy development across the country. Before graduate school, Tegen worked for the U.S. Antarctic Program at the South Pole and McMurdo stations and for the Center for Resource Solutions in San Francisco.

Beyond her job requirements, Tegen is passionate about mentoring and energy education, diversity, and inclusivity. She is a founding board member of Women of Renewable Industries and Sustainable Energy and serves on their Executive Committee.

Senior Policy Advisor

Tom Plant



Tom Plant served as director of the Governor’s Energy Office in the Ritter administration, with principal responsibility for developing and implementing the Governor’s policies for a new energy economy. He was Colorado House District 13 representative from 1998 through 2006, including two years as chairman of the House Appropriations Committee, and one year as Chairman of the Joint Budget Committee. Among the key pieces of legislation he sponsored were the Colorado Renewable Energy Act, and energy efficiency tax-incentive legislation.

Plant was named Legislator of the Year by such organizations as the University of Colorado and the Sierra Club of Colorado. He received Green Sense Award for Environmental Leadership from Colorado Conservation Voters, and the Champion of the Family Farmer Award from the Rocky Mountain Farmers’ Union. While serving in the legislature, Plant was executive director of the nonprofit Center for ReSource Conservation in Boulder, Colorado.

After graduating from Colorado State University, Plant worked as an exploration geologist. Then he joined the Union of Concerned Scientists in its Climate Change Department. At UCS, he explored the causes of global climate change and examined transportation and energy solutions to reduce greenhouse gas emissions.

Senior Policy Advisor

Patrick Cummins


Patrick Cummins is a Senior Policy Advisor at the Center for the New Energy Economy where he leads the Center’s work with Western states, utilities, and stakeholders on the transition to a low-carbon economy.  Patrick has been working with Western states and stakeholders on air quality and climate programs for 30 years, including at Metro Denver’s Regional Air Quality Council, and as the Director of Air Quality and Climate Programs at the Western Governors’ Association.  Prior to joining Governor Ritter’s team at Colorado State University he served as Executive Director of the Western Climate Initiative, where he helped develop and implement the world’s first economy-wide cap-and-trade program for greenhouse gas emissions which is being implemented by the State of California and the Canadian provinces of Quebec and Ontario.  Patrick has a Chemistry Degree from Fort Lewis College and a Master’s Degree in Environmental Policy from Indiana University.

Senior Policy Advisor

Dennis Arfmann


Dennis Arfmann is a Senior Policy Advisor at the Center for the New Energy Economy.  Dennis brings his unique skill set to the Center.  As a partner in the Colorado office of Hogan Lovells L.L.C. (a large international law firm based in London and Washington, D.C with 46 global offices) he was the Co-Chair of the firm’s Climate Change & Clean Energy Group before he retired from the firm.  Dennis worked with a number of utilities and clean energy companies located West of the Mississippi River. He focused his efforts on air quality, climate change and clean energy matters. He placed particular emphasis on resolving complex policy, regulatory, and legislative policy issues, with a focus on climate change issues.

Mr. Arfmann is a published author and a frequent lecturer on climate change, clean energy & environmental topics. He was appointed to the Western Regional Air Partnership Market Trading Forum, the American Solar Energy Society Board of Trustees, and the Colorado Climate Change Advisory Council.  He currently serves on the Board of Directors for the Earth Day Network in Washington, D.C. and the Board of Directors for the Bridge House in Boulder, CO.

He received an LL.M., with highest honors, in Environmental Law from The George Washington University, and a J.D. from the University of Nebraska.

Executive Assistant to the Director

Wendy Hartzell


Wendy started her career as a legal secretary working in the Office of the City Attorney for the City of Fort Collins, Colorado in 1988. She went on to support the offices of Neighborhood Services and Human Rights for the City of Fort Collins until 2006 when she left the City to work for a private family foundation.  She returned to the public sector in 2008 when she came to Colorado State University to support the Director of the CSU Engines and Energy Conversion Lab.  In 2012, Wendy left CSU to support the CEO and Co-Founder of New Belgium Brewing Co., returning in 2014 to support Gov. Ritter and his team at the Center for the New Energy Economy.  She is a CSU graduate, receiving her BA in Liberal Arts, Social Sciences with a minor in Spanish.  Wendy has a terrific husband, two funny children, two messy cats and one adorable granddaughter.

Research Manager

Katherine Heriot Hoffer


After interning with CNEE as a Research Associate since 2013, Katherine joined the CNEE team full-time as Research Manager in April of 2017. Katherine oversees our research team, leading the development and maintenance of the Advanced Energy Legislation Tracker, the State Policy Opportunity Tracker for Clean Energy, The Clean Energy Policy Guide for State Legislatures, and contributes to a number of other CNEE projects.

Katherine received her Ph.D in Political Science from Colorado State University. Her Dissertation examined policy diffusion and policy change through the lens of Renewable Portfolio Standards. Katherine also received her M.A. in Political Science from Colorado State University, and has published research in Publius: The Journal of Federalism, Policy Sciences, and other venues.

A Colorado Native, Katherine is proud to hail from Red Cliff, where she grew up exploring the White River National Forest and the Holy Cross Wilderness.

Research Associate

Alison Anson, LEED Green Associate


Joining the CNEE team in June of 2017, Alison leads the annual Clean Energy Legislative Academy, manages marketing and communication efforts, and provides research and analysis support to the team. Prior to this position, Alison worked as a researcher and Project Coordinator at the Powerhouse Energy Campus in Fort Collins. She worked as a member of the Smart Village Minigrid team where CSU researchers and energy experts are working to bring sustainable electricity solutions into underdeveloped rural communities and measure its impact.

Alison graduated with a master’s degree in Sociology from Colorado State University. Her research studied networks of policy actors to better understand how collaboration occurs when solving complex environmental problems. This research used Social Network Analysis (SNA) as an innovative approach to identifying and implementing policy solutions. With this degree and bachelor’s degrees in both Environmental Sociology and Political Science, her passion lies in harmoniously bringing people, policy, and the environment together. While not a native, she has lived in Colorado for over 7 years and calls the mountains home.

Policy Analyst

Francisca Pretorius


After working as a graduate research intern with CNEE in 2017, Francisca joined the team in 2018 as a Policy Analyst, assisting senior policy advisor, Patrick Cummins, with his work with Western states, utilities, and other stakeholders on the transition to a low-carbon economy.

Francisca holds an LL.B (Bachelor of Laws) from the University of Pretoria, South Africa, an LL.M in International Trade Law with a thesis on carbon markets from the University of Stellenbosch, South Africa, and a Masters in Business Administration with a focus on Global, Social, and Sustainable Enterprise from Colorado State University.

A lawyer by trade, Francisca is qualified and licensed to practice law in South Africa and in Colorado. She worked as a senior associate at a corporate law firm in Johannesburg, South Africa, and she currently consults with and provides legal and business advice to social and environmental enterprises in the U.S. Francisca also has 12 years of academic experience, including working as an adjunct lecturer at Strathmore University’s law school in Nairobi, Kenya, and lecturing on International Environmental Law and Environmental Justice in South Africa and Colorado.

Graduate Intern

Seth Crew


Seth joined CNEE as a graduate intern in June of 2017. Most of his work at the Center involves research for the State Policy Opportunity Tracker for Clean Energy and the Advanced Energy Legislation tracker. Seth is also a PhD student in the Political Science Department at Colorado State University, where he studies American politics and environmental policy, focusing on issues such as ecological conservation and energy/mineral extraction on public lands. Seth lived in Atlanta prior to beginning his program at CSU, where he is originally from. He received a Master of Natural Resources degree from the University of Georgia’s School of Forestry in 2015. Currently, Seth’s dissertation research is examining environmental regulation of the electricity sector and implementation of state energy policy.