Najmi Jarwala, President of Sony Ericsson USA and head of the company’s North American operations, is leaving Sony Ericsson. The company stated that he was leaving “to pursue other career opportunities.”

The U.S. market has been a struggle for Sony Ericsson’s well-reviewed but expensive smartphones, such as the Xperia X1 (pictured). Last week Sony Ericsson revealed that it expects to lose between $460 million and $528 million during the first quarter of the year, as demand falls for its phones. Through carriers such as AT&T and T-Mobile, they continues to emphasize the entertainment capabilities of lower-end feature phones. Sadly, they have not had any huge success since the Cybershot and Walkman phones.

Sony Ericsson’s Windows Mobile-based Xperia X1 has received positive reviews but no U.S. carrier offers the phone, which means it costs a prohibitively expensive $799.99. The company plans to announce a replacement for Jarwala “in due course.” The company is not having a lot of luck this year…

[via CNET]