Maxis has appointed Patrick Er as its chief sales and services officer (CSSO), effective June 1, replacing Tan Lay Han who is retiring after serving for nearly 22 years. Patrick was the head of regional sales management for Peninsular Malaysia, prior to his appointment as CSSO. He was responsible for developing regional business direction and strategies, building and motivating the sales organisation, driving segment and Below-the-Line brand execution, and formulating the channel development plans.