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. NamePositionRobert BroderickPrincipal Member, Technical StaffRachid Darbali-ZamoraSenior Member, Technical StaffJohn EddyPrincipal Member, Technical StaffSummer FerreiraManager, Renewable Energy and Distributed Systems IntegrationJack FlickerPrincipal Member, Technical StaffBrooke Marshall GarciaPrincipal Member, Technical StaffSigifredo GonzalezPrincipal Member, Technical StaffNicholas GuruleMember of Technical StaffClifford HansenDistinguished Member, Technical StaffShamina Hossain-McKenziePrincipal Member, Technical StaffJay JohnsonPrincipal Member, Technical StaffC. Birk JonesSenior Member, Technical StaffMatthew LavePrincipal Member, Technical StaffAndrea MammoliPrincipal Member, Technical StaffIfeoma OnunkwoSenior Member, Technical StaffJimmy QuirozMember, Technical StaffMichael RoppPrincipal Member, Technical StaffAmanda WachtelPrincipal Member, Technical StaffWilliam F. ViningMember, Technical Staff Support Staff NamePositionRoy LopezPrincipal TechnologistJeff ZirzowDistinguished Technologist .