Sina Tamaddon joined Apple in September 1997. He also served the company in the position of Senior Vice President, Worldwide Service and Support and Vice President and General Manager, Newton Group. Before joining the company Tamaddon held the position of Vice President, Europe with NeXT from September 1996 through March 1997. From August 1994 to August 1996 Tamaddon held the position of Vice President, Professional Services with NeXT.
Prior to August 1994 Tamaddon worked for Software Alliance w Todd Rulon-Miller. Prior to joining Software Alliance, Tamaddon worked for NeXT as the Sales Manager for their Chicago Office. Prior to NeXT, Tamaddon worked for Sun Microsystems.