Speaker Bios

Chris Hansen  

Senator Chris Hansen represents Senate District 31 in the Colorado State Senate. He specializes in energy sector economics and data analytics, with 20 years of experience in the global energy industry. He currently serves on the Senate Finance, Senate State, Veterans, & Military Affairs, and Appropriations committees. Prior to his work as an elected official, he served as Senior Director at IHS Markit where he led a global portfolio of energy products, events and partnerships. He is a co-creator of the OptGen analysis, IHS CERA’s unique tool for applying financial portfolio techniques to power generation.

Dr. Hansen holds a BSc in Nuclear Engineering from Kansas State University; a Graduate Diploma of Civil Engineering from the University of the Witwatersrand, South Africa; a Master of Science in Technology Policy from MIT; and a PhD in Economic Geography from Oxford University. In addition to his current role in the state senate, Hansen serves as the Co-Founder and Director of Programming at the Colorado Energy & Water Institute, and as Co-Founder of the Colorado Science and Engineering Policy Fellowship.

Chris Hansen
Colorado State Senator
District 31 at State of Colorado
Carl Linvill

Dr. Carl Linvill is a Principal with Regulatory Assistance Project (RAP) and is based in Davis, California.  Carl helps economic and environmental regulators meet their state’s carbon reduction goals, focusing on power sector planning, regulatory and market reforms that facilitate advanced technology futures.  His current projects address distributed energy resource valuation and compensation, integrated distribution and resource planning and performance-based regulation.

Prior to joining RAP, he was Economic and Energy Advisor to Nevada Governor Kenny Guinn, Director of the Governor’s Office of Energy, a Nevada Public Utilities Commissioner, and an academic and consulting economist.  Carl received his BA in Mathematics from UC Davis, and his PhD in Economics from the UNC - Chapel Hill.

Carl has served on the California ISO Energy Imbalance Market (EIM) Governing Body since 2016, serving as chair in 2019 and 2020.

Carl Linvill
Regulatory Assistance Project

Nidhi Thakar


Nidhi Thakar is a clean energy and environmental leader with almost two decades of experience working in the executive and legislative branches. She has previously held roles in the Obama and Governor Brown administrations, as well as in the private sector. She currently is the Director of Strategy at Portland General Electric, and formerly was Chief for Strategy and External Affairs at the California Public Utilities Commission. Nidhi currently serves as a board member for several philanthropic organizations, including E4TheFuture and the Oregon Zoo Foundation. 

Nidhi Thakar
Director of Strategy 
Portland General Electric






Sarah Webster


Sarah Webster is Vice President of Investor Relations, Government Relations and Corporate Communications for Pattern Energy. In her role, Ms. Webster oversees Pattern Energy’s global investor relations program, as well as all government relations at the state, provincial, and federal levels. She is also responsible for corporate communications, including media, branding, and corporate social responsibility. Ms. Webster has been with Pattern Energy since 2013, and she enjoys the opportunities her position affords her to build relationships with company stakeholders and serve as the diplomatic core for Pattern Energy.

Ms. Webster has worked in the energy sector for nearly 20 years, including positions with Winner and Associates, InterGen, Shell, Great Point Energy, and Wind Capital Group. She has also worked as a music critic for the Houston Press. 

Sarah Webster
Vice President, Investor Relations, Government Relations and Corporate Communications
Pattern Energy



Jeff Guldner

Jeffrey Guldner
Arizona Public Service Company

Jeff Guldner is president of Arizona Public Service Company (APS), the primary subsidiary of Pinnacle West Capital Corporation. Based in Phoenix, APS is Arizona’s largest electric company and serves 1.2 million customers across the state. Guldner was named president in December 2018 and is responsible for all areas of APS, excluding nuclear generation. He also continues to lead regulatory and government affairs activities at the local, state and federal levels as executive vice president, public policy, for Pinnacle West. Prior to joining APS in 2004, Guldner was a partner in the Phoenix office of Snell & Wilmer LLP, where he practiced public utility, telecommunications and energy law. Before practicing law, Guldner served as a surface warfare officer in the United States Navy and was an assistant professor of naval history at the University of Washington.


Guldner actively serves on external boards, including the Greater Phoenix Economic Council, the Partnership for Economic Innovation, the National Association of Manufacturers, and Arizona Theatre Company. He is chair of the East Valley Partnership board of directors. He earned a Bachelor of Arts degree from the University of Iowa and graduated magna cum laude from the Arizona State University College of Law. Guldner also completed the Reactor Technology Course at the Massachusetts Institute of Technology and the Advanced Management Program at Columbia Business School.





Justin Segall is the Chief Strategy Officer of Uplight, where he leads corporate strategy, M&A, partnerships, marketing, and regulatory affairs. Justin is passionate about accelerating a clean energy future by motivating and enabling a new technology-driven connection for energy users and providers. Justin has been an entrepreneurial leader at the intersection of energy, community development, and public-private partnerships for over 15 years. In addition to co-founding and serving as President of Simple Energy, Justin drove the initiative to certify the company as B-Corporation. Prior to Simple Energy, Justin served as Vice President of Resource Development for Renewable Choice Energy. Justin graduated cum laude from Duke University, where he spearheaded the university’s path to leadership in sustainability. When not pursuing his purpose-driven work, you can find him spending time with his wife, daughter, and son and exploring the great outdoors.

Justin Segall
Chief Strategy Officer

Sarah Slusser is an expert in power markets, with 30 years of development, finance and operations experience. She is an accomplished investor and officer of public and private companies, having led investments of $3 billion across the electric sector. During her 21 years at AES, she rose to be a senior officer and built and ran the Mexico, Central America, and Caribbean division. Sarah co-founded GeoGlobal Energy, a geothermal company in the US, Chile, and Germany, which was sold to its investor. Subsequently, she co-founded Point Reyes Energy Partners. Sarah graduated from Harvard University with Honors and received an MBA from Yale School of Management.

Sarah Slusser
Cypress Creek Renewables

Prasanna Venkatesan
President and CEO, Americas
Landis + Gyr

Prasanna Venkatesan currently serves as President & CEO of Landis+Gyr Americas.  In this role, he is responsible for all aspects of business within the region, including full P&L responsibilities for operations in both North and South America, customer satisfaction, development and execution of the regional growth strategy, as well as managing a broad portfolio of innovative products, solutions, and services to empower utilities and end-customers to improve their energy efficiency, reduce their energy costs and contribute to a sustainable use of resources.Prior to his current role, Mr. Venkatesan served as Senior Vice President & General Manager for Landis+Gyr North America where he was responsible for the introduction and execution of all smart grid solution deployments for North American utilities.

Mr. Venkatesan serves as Executive Vice President of Landis+Gyr Holdings where he helps develop and execute the corporate strategy in conjunction with the worldwide company leadership team. He holds a Board of Director seat for Advanced Energy Economy (AEE), a national association of business leaders who are making the global energy system more secure, clean, and affordable. He also represents Landis+Gyr as a Board Advisor for the Metro Atlanta Chamber for Economic Development.He holds a Master of Science in Industrial Engineering from University of Oklahoma, Norman.

Cathy Zoi

Cathy Zoi

Cathy Zoi is the Chief Executive Officer (CEO) of EVgo. Zoi is a distinguished executive with decades of experience in the clean energy, investing, and policy communities. She is committed to working closely with automotive OEM, new mobility partners, utilities, and other industry stakeholders to deliver an exceptional fast-charging network for EV drivers in the United States and across the world.Zoi has held a number of senior executive positions in the energy industry, government, academia and non-profit sectors. Most recently, she was President and co-founder of Odyssey Energy, a distributed generation software company she continues to chair. She was founding CEO of Frontier Power, a rural electrification company incubated by SunEdison. Zoi was an energy investor at Silver Lake and Bayard Capital, a board member for Ice Energy, SES, and Pacific Solar, and a management consultant at ICF and Next Energy. She served in the Obama Administration as Assistant Secretary and Acting Under Secretary at the Department of Energy, where she oversaw more than $30 billion in energy investments.

Zoi was also the founding CEO of both the Alliance for Climate Protection, established and chaired by U.S. Vice President Al Gore; and the Sustainable Energy Development Authority, a $50m fund to commercialize clean energy technologies in Australia. In the early 1990s, Zoi was Chief of Staff for Environmental Policy in the Clinton White House and she pioneered the Energy Star program while at the U.S. EPA. Zoi was also an adjunct professor and Precourt Energy Scholar at Stanford University, where she taught and did research between 2012 and 2017. Zoi has a B.S. in Geology from Duke University and an M.S. in Engineering from Dartmouth.




Estela de Llanos
Vice President, Clean Transportation, Sustainability and Chief Environmental Officer
San Diego Gas & Electric (SDG&E)


Estela de Llanos serves as vice president of clean transportation, sustainability and chief environmental officer for San Diego Gas & Electric (SDG&E), one of Sempra Energy's regulated California utilities. In this role, de Llanos oversees clean transportation, advanced clean technologies, environmental compliance, and sustainability initiatives. 
De Llanos joined Sempra Energy in 2007 as senior environmental counsel and has held a number of positions within the Sempra family of companies. Prior to joining Sempra Energy, she was an attorney in the Los Angeles office of Latham & Watkins LLP, where she specialized in land use and environmental matters in connection with major projects throughout California. 
De Llanos currently serves on the board of the California League of Conservation Voters Education Fund, the Coalition for Clean Air and the Francis Parker School Board of Trustees. She previously served on the Board of the Los Angeles Center for Law and Justice and the Del Mar Schools Education Foundation. 
De Llanos holds a law degree from the University of Pennsylvania and a bachelor’s degree in psychology with a second major in international studies from Yale University.




Duncan McIntyre
Highland Electric


Duncan McIntyre is the current CEO of Highland Electric having founded it in the second half of 2018. He is responsible for overall company vision, leadership, and strategy by playing key roles in all aspects of sales, financing, and operations.

Duncan previously founded Altenex (2011), a marketplace for renewable energy procurement, analysis, and deal structuring and led its successful sale to Edison International in 2015. While at Altenex, he built over 2 GW of utility scale renewable energy for corporations. Duncan has also had a prior career in venture capital and investment banking. His background covers many aspects of energy, including financing, new technology implementation, business model development, procurement, and team building.

Duncan graduated from Babson College with a degree in Finance.



Mona Tierney-Lloyd
Head of U.S. Public Policy
Enel North America Inc.


Mona Tierney-Lloyd has been active in the development of energy policy and advocating for supportive policies for distributed energy resources, including demand response, energy efficiency, energy storage and electric vehicle charging in the Western United States for over 20 years, with a total of 30 years of energy experience. She has been employed by Enel X North America, formerly EnerNOC, Inc., since 2008. Enel X NA provides demand response, energy efficiency, energy storage and electric vehicle charging services in the West. Mona is Chair of the Board of the California Energy Storage Alliance (CESA) and is on the board of the Center for Energy Efficiency and Renewable Technologies (CEERT). She is the Energy Committee Co-Chair for Silicon Valley Leadership Group, where she received the Chairman’s Award in 2018, and the Western Chair of the Advanced Energy Management Alliance. She received the “Innovator, Woman of the Year” Award by California Women in Energy in 2017. She is active in other trade organizations include Advanced Energy Economy, TechNet, California Efficiency and Demand Management Council and Mission:data. She is also Chair of the ERCOT Demand-Side Working Group, active in the Texas Advanced Energy Business Alliance and the Arizona Independent System Administrator and is a former Board Member of the AZ Independent System Administrator.

Prior to her employment with Enel X NA, Mona was a Regional Vice President of Government Affairs for Constellation NewEnergy and Director of Government Affairs for Enron Energy Services. She also worked for San Diego Gas & Electric and Elizabethtown Gas Company. Mona began her career working for a natural gas and petroleum exploration and development company (Atlas Energy Group). She has a BS Degree in Petroleum and Natural Gas Engineering from Penn State.


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