there's no official 'Manager' designation unless you are referring to IDA secondees? MOF officers are on Associate > Snr Asc > Hd > (DD) > Dir as per the rest of civil service. If you are asking what MX level is a Head level position typically at, could be MX11 or 10. There were MX12 head positions before but that's the exception rather than the norm (i.e. formerly hi-po).