I have work as mso for a year plus.. after first year contract convert to perm u got abt $100 increment.. after that year by year increment depends on ur performance.. can be as low as peanuts $40 i heard.. going to mso 5 also depends on ur boss.. boss appraise u good than better promotion chances... if not must wait long2.. can take years also.. but i got saw an mso 1 before.. he is a manager.. going up the ranks really depends on ur boss.. u carry alot and ur boss like u easy to promote.. important is must show ur boss what u do at work.. boss usually want see results and what ur contribution is.. my friend an mso in police his boss say.. in police so many mso, how he promote is depends on how the mso contribute...