Stefan T. Bichsel was appointed chief executive officer of Robeco USA...

Stefan T. Bichsel was appointed chief executive officer of Robeco USA, New York, replacing Nassos Michas, who left the company, according to a news release from the firm. Mr. Bichel will retain his position on the executive board of Robeco Group, Rotterdam. In addition, Mr. Bichsel will succeed Mr. Michas as president and chief executive of Robeco unit Weiss, Peck & Greer, New York. Additional details on Mr. Michas' departure were not available.