Three new directors have been appointed at Ticona, the engineering polymers business of Celanese AG. Michael Oberste-Wilms, who has been responsible for investor relations at Celanese AG for three years, has been named European sales director. The previous sales director, Gregor Bommel, has taken over global responsibility for the Topas COC business line. Mr. Bommel now reports to Thomas Hensel, vice president of global demand. Additionally, Anthony O’Driscoll became Americas sales director, effective this summer. Mr. O’Driscoll joined Ticona from Ciba Specialty Chemicals.