With thirty years of experience in the energy industry, Michael Polsky is widely recognized as a pioneer and an industry leader in the cogeneration and independent power industry in North America. He founded leading clean energy company Invenergy more than ten years ago. Previously, in 1991, Polsky founded Sky Gen Energy - a developer, owner, and operator of natural gas-fueled generating plants – which was purchased by Calpine Corporation in 2001. Before forming SkyGen, Polsky co-founded and was President of Indeck Energy Services Inc. Polsky holds an MSME Degree from Kiev Polytechnic Institute and an MBA from the University of Chicago. In 2002, Polsky endowed a center for Entrepreneurship at the University of Chicago Graduate School of Business, which is named after him.


Jim Murphy has more than thirty years of financial and management experience, primarily in the energy industry, having managed the negotiation and execution of over $20 billion in private equity and debt investments, power plant acquisitions and sales, and project debt and equity financing. He is a member of Invenergy’s founding group and is responsible for the general management of the company, as well as corporate and project finance, risk management, and asset optimization. Murphy currently is a member of the Board of Directors of the American Wind Energy Association (AWEA). Prior to the formation of Invenergy, he was Chief Financial Officer at Sky Gen Energy LLC, and previously was a Vice President with financial advisory and investment firm The Deerpath Group, Inc. and a manager with Arthur Andersen. He earned a BS from the University of Illinois, magna cum laude, as well as CPA certification.

Jim Shield, EVP and Chief Development Officer

With more than 25 years of experience in all aspects of the power generation industry, Jim Shield is responsible for the development, marketing, engineering, and construction of Invenergy’s wind, solar, and thermal energy projects worldwide. During his career, he has developed over 8,500 MW of power projects and negotiated 3,000 MW of long-term energy off-take agreements. Prior to joining Invenergy, Shield held various positions with Calpine Corporation, including Senior Vice President-East Region. Earlier, he was a key contributor in building SkyGen Energy from a start-up company, and a project manager at Indeck Energy Services. Shield has a BS in Mechanical Engineering from the University of Michigan and an MBA from DePaul University. He is a Registered Professional Engineer in the State of Illinois.

Joe Condo, SVP and General Counsel

Joe Condo oversees all corporate legal affairs for Invenergy, and is responsible for developing and implementing corporate legal policy. He serves the company as counsel on a wide range of transactions in North America and Europe, including private equity financings, mergers and acquisitions, and other commercial business, and also is Invenergy’s primary representative on federal legislative issues. Condo joined Invenergy after five years as senior counsel for Calpine Corporation. Earlier, he served as an assistant corporation counsel of the City of Chicago and an assistant attorney general for the State of Iowa. Condo has a BA in Communications from the University of California at Los Angeles and a JD from the University of Southern California. He is a member of the state bars of Illinois, Iowa, California, and the District of Columbia.


Alex George leads the operations and asset management of Invenergy’s growing portfolio of wind, thermal, and solar power generation and energy storage facilities. He has over 30 years of broad experience in the power industry, having led the commissioning, operation, and asset management of more than 7,000 MW of natural gas generation and 5,800 MW of wind generation during his career. Prior to joining Invenergy in 2002, George was Vice President of Operations and Asset Management at Calpine. Before then, as one of the original team members at SkyGen, he was Vice President of Operations and Asset Management. Previously, George was a professional engineer at both CRS Sirrine Engineers and Sargent & Lundy. He has a BS in Mechanical Engineering from the University of Illinois and an MBA from the University of Illinois-Chicago.

James Rafferty, SVP of Administration, Chief Administrative Officer - Operating Business Group

JAMES RAFFERTY, SVP of Administration,
Chief Administrative Officer - Operating Business Group

James Rafferty oversees Human Resources, IT, budget and analysis, and international infrastructure for Invenergy’s Operating Business Group. Rafferty previously served as Vice President of Asset Management for the company, responsible for the operation and asset management of Invenergy’s wind power generation facilities. He has more than 15 years of experience in the power industry, including engineering, project management, commissioning, and asset management. Prior to joining Invenergy in 2008, Rafferty held various roles in IT, project management, and finance at Exelon Corporation. His last position at Exelon was Manager of Financial Planning and Analysis for the Exelon Nuclear business unit. Previously in his career, he was a consultant for a supply chain automation company, working on various projects to optimize manufacturing facilities. Rafferty holds a Bachelor of Science in Electrical Engineering from Marquette University, and an MBA from DePaul University.

Steve Ryder, SVP of Finance,
Chief Financial Officer - Operating Business Group

Steve Ryder is the Chief Financial Officer for Invenergy’s Operating Business Group, where he manages capital raising efforts related to its generation portfolio and oversees treasury, tax, accounting, risk management and investor relations matters for the company. Prior to his current position, Ryder headed Invenergy’s project finance team, where he oversaw the negotiation and execution of more than $5 billion in transactions. Over the last 25 years, Ryder has held several finance and technical positions, including at GE Capital, the International Finance Corporation (IFC), the U.S. Agency for International Development (USAID), and AT&T/Lucent Technologies. A Chartered Financial Analyst, Ryder earned a BS in Electrical Engineering magna cum laude from Tufts University and a Masters in Public Affairs from Princeton University.

Bryan Schueler, SVP of Development

A twenty-year veteran of the power industry, Bryan Schueler is responsible for project development at Invenergy. He has experience in plant operations and engineering, as well as the development, permitting, and construction of biomass, wind, landfill gas, and natural gas projects. Over the course of two decades, Schueler has successfully managed the development and construction of more than 20 wind farms and over 2,500 MW of natural gas-fired facilities. Before joining Invenergy, Schueler was a project director at Calpine, fulfilling the same role he held earlier at SkyGen. Previously, he was a performance engineer at a 1,000 MW coal station for Commonwealth Edison. Schueler has a BS in Mechanical Engineering from Purdue University and an MBA from the University of Illinois.

Kris Zadlo, SVP, Regulatory Affairs, Storage and Transmission

KRIS ZADLO, SVP of Regulatory Affairs, Storage and Transmission

With more than twenty-five years of electric power industry experience, Kris Zadlo oversees Invenergy’s national and regional commercial activities pertaining to energy storage, market analytics, regulatory affairs, and transmission. He was responsible for establishing the company’s energy storage program, and heads Invenergy’s storage development team. Previously, Zadlo was Vice President of Transmission for Calpine Corporation, and earlier held various management positions during his ten years at Commonwealth Edison Company of Chicago. A Registered Professional Engineer in the State of Illinois, Zadlo graduated cum laude with a Bachelor of Science in Electrical Engineering from Rose-Hulman Institute. He has a Masters in Electrical Engineering from Purdue University.

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