Sony Ericsson has a change in its top management. Chief Technology Officer Mats Lindoff has decided to leave the company at the end of March to pursue new career opportunities outside of Sony (NYSE: SNE) Ericsson (NSDQ: ERIC). He’ll be replaced by Ronald Louks, who’ll be promoted internally from Head of Technology, Americas and Deputy CTO. Sony Ericsson has seen marketshare fall recently, with its sales in the fourth quarter of 2008 falling by 21 percent, more than the industry as a whole. (release via Engadget)