Joy Business has learnt mobile operator, MTN has appointed Cynthia Lumor as its new Corporate Services Executive after the exit of Mawuena Trebarh.Mrs Lumor’s appointment is said to take effect from next month.Cynthia comes to MTN Ghana from the Ghana National Petroleum Corporation, where she was the Chief Legal Officer.Prior to this, she worked in diverse strategic and tactical positions and functions with AT&T Incorporated, USA, North America’s telecom market leader for over 15 years.