Leonardo Baldassarre is currently the Engineering Ldr for Compressors, Expanders, Electrical System & Transmissions with General Electric Oil & Gas Company, in Florence, Italy. He is responsible for all requisition, and standardization activities as well as for the development of new products and technologies. Dr.Baldassarre began his career with General Electric Nuovo Pignone in 1997. He has worked as Design Engineer, R&D Team Leader for centrifugal compressors in Florence, Product Leader for centrifugal and axial compressors, and Requisition Manager for centrifugal compressors both for Florence and Le Creusot teams. He is active member of the Turbomachinery Symposium Advisory Committee and represents GEO&G in the API617 Committee. Dr. Baldassarre received a B.S. degree (Mechanical Engineering, 1993) and Ph.D. degree (Mechanical Engineering / Turbomachinery Fluid Dynamics, 1998) from the University of Florence. He has authored or coauthored 30+ technical papers, mostly in the area of fluid dynamic design of 3D transonic impellers, rotating stall, and rotordynamics. He presently holds 8 patents.