No, an MPS is quite high up. The MPS in Victor is in charge of Victor, Goolwa, Strath, Yank, Meadows, Mount Barker and Stirling. RTL sits below him and is in charge of the Vol stations.
LT is not an MPS. LT is a paramedic TL of the Non-Emerg services.
Not sure of Victor MPS's callsign, but he is a daily job (9-5).
There are a number of M'sPS, ie MPS - Metro East, Metro North etc.