Mr. Shield is responsible for the development, marketing, engineering, and construction of Invenergy’s wind, solar and thermal energy projects worldwide. He has over 25 years of experience in all aspects of the power generation field including: business development, permitting, engineering, construction, thermal cycle analysis, project management and operations. He has worked on wind, coal, natural gas, cogeneration, biomass, solar and nuclear projects. Mr. Shield has developed over 8,000 MWs of power projects and negotiated 2,500 MWs of long-term energy off-take agreements.

At Invenergy, Mr. Shield has overseen the successful development and completion of 500 MWs of wind projects and is managing the implementation of over 1,000 MWs of wind and solar projects that are currently under construction and contract.  

Prior to joining Invenergy, Mr. Shield held various positions with Calpine Corporation including Senior Vice President East Region, heading up Calpine’s 12,000 MW portfolio of natural gas-fired power plants in the U.S. and Canadian eastern markets, and Senior Vice President Business Development, heading up Calpine’s development program.  Mr. Shield restructured the East Region business unit from negative cash flow to over a $150 million positive cash flow annually, and directed the divesture of over $600 million of assets.   Prior to Calpine, he was a key contributor in building SkyGen Energy from a start-up company.  As Vice President of Engineering and Project Management, Mr. Shield was responsible for project development, engineering, and construction activities for all of SkyGen’s projects from the company’s formation until it was acquired by Calpine.

Before joining SkyGen in 1991, Mr. Shield was project manager at Indeck Energy Services.  He started his career as a mechanical engineer at Sargent and Lundy Engineers.

Education: MBA from DePaul University; BS in Mechanical Engineering from the University of Michigan - Ann Arbor; Registered Professional Engineer in the State of Illinois.