Jay Parker, who recently resigned from his post atop Lenovo’s Enterprise Business Group, has taken on a new role at a competing PC power house: Dell. The Texas-based computer maker confirmed the news Monday. Parker’s new title is vice president and general manager of North America Enterprise Solutions Sales for Dell. Over the years, Lenovo has risen to PC dominance and is trying to chart a similar course with servers, having acquired IBM’s Research Triangle Park-based low-end server division. Read:…