PLEASANTON, Calif.--(BUSINESS WIRE)--Ellie Mae® (NYSE: ELLI), a leading provider of innovative on-demand software solutions and services for the residential mortgage industry, today announced that Dr. Selim Aissi has joined the company as Chief Security Officer (CSO). In this role, he will have responsibility for Ellie Mae’s overall security program, including security operations, security engineering, and governance, risk, and compliance. Prior to joining Ellie Mae, Selim was the Vice Presiden