Shin-Etsu Silicones of America, Inc. recently expanded its silanes sales team with the addition of new regional sales managers. Elizabeth Roetger, who spent the past eight years with Evonik Corp., is handling the North American sales territory east of the Mississippi River. Bill Severns, who has a background in thermoplastics and has been with Shin-Etsu for four years, handles the sales territory to the west.