Depends on many factors eg How old are you now? What is your current salary, which quickly tells you how far away you are from the next salary band. What is your educational qualifications Masters or Bachelors. Do you have any supervisory experience? There are people who describe themselves as mid career but they have zero supervisory experience with MX11A to MX13 officers working under them. The reason why we are talking about supervisory experience is because MX10 is a DD grade. If you are totally inexperienced, the chances of you moving up to MX10 will take even longer. Lastly, how good a performer are you? F you are just average, you can wait and wait for your next promotion. You must understand that MX9 is a superscale position and MX10 is one grade below that. Many people don't ever reach MX9. MX10 is not for everyone either.