John W. Carroll John W. Carroll
Attorney at Law
Pepper Hamilton LLP

John W. Carroll is a partner in the Harrisburg office of Pepper Hamilton LLP and chairman of the firm's Environmental Practice Group. Mr. Carroll joined Pepper in 1987, after serving three years as chief counsel of the Pennsylvania Department of Environmental Resources (DER). Mr. Carroll maintains an energy and natural resources practice which involves litigation, counseling, transactional representation and government relations for various clients. Mr. Carroll began his legal career in 1972 as a special assistant attorney general with DER and served in a number of capacities with the agency over fifteen years, including the position of associate deputy secretary. While with DER, Mr. Carroll drafted oil and gas lease forms and gas storage forms for the Department's Bureau of Forestry, drafted oil and gas regulations, represented the Department in lobbying for passage of the Oil and Gas Act of 1984, and litigated administrative cases involving oil and gas related issues. Mr. Carroll has served on the Legal Committee of the Interstate Oil Compact Commission and as a member of the Pennsylvania Environmental Hearing Board Rules Committee. He currently serves as Vice Chair of the Pennsylvania Bar Association's Environmental and Energy Law Section, and chair of the section's Oil and Gas Committee. He previously served as an adjunct assistant professor of law at the Dickinson School of Law of the Pennsylvania State University, where he has taught courses in natural resources law, environmental law, environmental compliance, environmental litigation, and toxic torts. Mr. Carroll earned a B.A. (in Geology) and a J.D. from the University of Pennsylvania.

Jeffrey L. Clarke Jeffrey L. Clarke
General Counsel and Director of Regulatory Affairs

Mr. Clarke serves as the General Counsel and Director of Regulatory Affairs for NGVAmerica. NGVAmerica is the national trade association dedicated to promoting natural gas as a transportation motor fuel. Mr. Clarke has extensive experience in energy policy and regulatory affairs, having previously worked in government relations for the American Gas Association and in a previous role for NGVAmerica. Prior to rejoining NGVAmerica in August of 2006, he worked for New West Technologies, serving as a Senior Project Manager, providing regulatory and legislative support for government agencies. He also previously worked in the Washington Office of the National Renewable Energy Laboratory (NREL), serving as a policy analyst, supporting transportation programs for the U.S. Department of Energy's Office of Energy Efficiency & Renewable Energy. Mr. Clarke has a J.D. in law from the University of Baltimore and an undergraduate degree from James Madison University.

Roe East Roe East
General Manager, On Highway Natural Gas Business
Cummins, Inc.

Roe has been employed at Cummins for 22 years, in a variety of marketing, sales, product planning, and business strategy roles. He is currently responsible for Cummins worldwide on-highway natural gas engine business. Prior to this role, Roe was President of Cummins Westport Inc., a joint venture focused on developing and marketing natural gas engines for the NAFTA region. Before joining Cummins, Roe had stints at both Emerson Electric and Caterpillar. He is a graduate of Rose-Hulman Institute of Technology and Northwestern University.

Caley Johnson Caley Johnson
Transportation Market Analyst
National Renewable Energy Laboratory

Caley Johnson is a transportation market analyst for the National Renewable Energy Laboratory (NREL). As an analyst, Caley provides feedback of the alternative fuel and vehicle technology markets to the Department of Energy (DOE). He also supports efforts to integrate a wide variety of petroleum-reduction technologies into local economies through the DOE's Clean Cities and Integrated Deployment programs. In a report titled "Business Case for Compressed Natural Gas in Municipal Fleets," Caley modeled the cash flow of investing in natural gas vehicles and refueling infrastructure. He has created similar models for both retail ethanol stations and various electric vehicle battery ownership scenarios. Before working at NREL, Caley was a Project Manager for the Climate Protection Partnerships Division of the Environmental Protection Agency. He holds a Bachelor of Arts degree in biology from the University of Colorado and a master of environmental management degree from Yale University.

Joyce Mattman
Director of Commercial Product and Specialty Vehicles GM Fleet and Commercial Operations
General Motors

Joyce Mattman was appointed Director of Commercial Product and Specialty Vehicles at GM Fleet and Commercial Operations in November 2008. This assignment brings her back to the commercial side of the business after serving two years as GM's Director of Residual Management from January 2007 to November 2008. Prior to that assignment, she worked in Fleet and Commercial Operations as both the Fleet Service Director and the Marketing Director between 2003 and 2006.

During the formative years of the Internet in the late 1990s, Mattman was appointed North American Marketing Director with GM's eBusiness Group. Prior to that she spent nearly a decade with the GMC Truck and Pontiac-GMC divisions, where she held both field and home office positions, called on dealers in California, Oklahoma and Colorado, and concentrated much of her time in the product planning and service areas. Mattman also spent time in GM's Truck Planning Group, where she focused on the development of powertrain plans.

Today, Mattman serves as co-chair of the National Commercial Dealer Council Product Committee and also serves in an advisory role on GM's Law Enforcement Product Council.

Mattman graduated with a Master of Business Administration degree from the University of Michigan in 1990 and later obtained a Professional Management Development degree from Harvard Business School in 1996. Her undergraduate degree in engineering is from Iowa State University.

Kent Wilkinson Kent Wilkinson
Vice President, Chesapeake Natural Gas Ventures (CNGV) Chesapeake Energy

Kent Wilkinson was named Vice President of Chesapeake Natural Gas Ventures in May of 2011. In this new role, Kent is responsible for finding, championing, funding and implementing strategies and asset investments designed to stimulate greater demand for natural gas in the United States. He is also accountable for Peake Fuel Solutions, LLC, and manages Chesapeake's investments in Clean Energy Fuels Corp. (Nasdaq:CLNE) and Sundrop Fuels, Inc. Kent joined Chesapeake's Midstream group in 2006 serving as Manager, Midstream System Development and Director, Business Strategy and Development. Prior to joining Chesapeake, Mr. Wilkinson worked in a variety of roles in the midstream portion of the natural gas industry and as an engineering consultant. Mr. Wilkinson graduated with a degree in Electrical Engineering from the University of Oklahoma; where he went on to receive his MBA. He currently serves on the board of Wireless Seismic as well as several non-profit boards.

Peggy Williams Peggy Williams
Editorial Director
Hart Energy

Peggy Williams is Editorial Director for Hart Energy. She is a certified petroleum geologist, and prior to joining Hart Energy in 1992 she worked for 16 years as a petroleum geologist in industry. Peggy holds a Bachelor's degree in Geology from the University of Rhode Island, a Master's in Energy Resources from the University of Pittsburgh and a Master of Science in Technical Communications from the University of Colorado.