DUBAI: Arabtec Holding, Dubai’s largest listed builder, has appointed a new chief executive to its wholly-owned construction subsidiary, the parent firm said on Tuesday. Raja Ghanma has been promoted from chief operating officer to CEO of Arabtec Construction, Arabtec Holding said in a bourse filing. Ghanma has worked for Arabtec for more than 20 years and was a board member of the Arabtec Holding from 2008-2014, the statement said.