David was previously a Managing Director at Goldman, Sachs & Co. where he was the Chief Financial Officer of the Renewable Power Group of Goldman Sachs Asset Management. Prior to joining Goldman Sachs, he served as Senior Vice President and Chief Accounting Officer at NRG Energy Inc. (NYSE: NRG). Mr. Callen also served as Vice President and Chief Accounting Officer of NRG Yield, Inc. (renamed Clearway Energy, Inc. in 2018 (NYSE: CWEN)) from 2015 to 2018.
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