Sandia Energy > Programs > Electric Grid > Renewable Energy and Distributed Systems Integration > Key Personnel Program Staff Contact an expert within Sandia’s Renewable and Distributed Energy Systems Program. Robert Broderick Principal Member, Technical Staff Learn more Summer Ferreira Manager, Renewable Energy and Distributed Systems Integration Learn more Rachid Darbali-Zamora Senior Member, Technical Staff Learn more Jack Flicker Principal Member, Technical Staff Learn more John Eddy Principal Member, Technical Staff Learn more Brooke Marshall Garcia Principal Member, Technical Staff Learn more Sigifredo Gonzalez Principal Member, Technical Staff Learn more Nicholas Gurule Member of Technical Staff Learn more Ross Guttromson Principal Member, Technical Staff Learn more Clifford Hansen Distinguished Member, Technical Staff Learn more Robert “Bobby” Jeffers Principal Member, Technical Staff Learn more Jay Johnson Principal Member, Technical Staff Learn more C. Birk Jones Senior Member, Technical Staff Learn more Matthew Lave Principal Member, Technical Staff Learn more Shamina Hossain-McKenzie Principal Member, Technical Staff Learn more Jimmy Quiroz Member, Technical Staff Learn more Support Staff Michael Ropp Principal Member, Technical Staff Learn more William F. Vining Member, Technical Staff Learn more Roy Lopez Principal Technologist Learn more Jeff Zirzow Distinguished Technologist Learn more .