I am currently a Marketing Specialist (as classed by VETASSESS) and it WAS on the state sponsored list for Canberra. I started the process and employed an agent (OE Visas - Richard Greagan) and applied for my VETASSESS which includes providing 8 years of payslips of P40's, all certificates from qualifications, letters from employers to vouch for my experience etc. From start to finish the whole VETASSESS took 8 months but I did get a positive assesment but by then the state sponsored list for Marketing Specialist had closed. I am now waiting to see if it comes back on the list 1st July.
It isnt on any other list and if it does go back on the places will be very limited. I would highly recommend an agent if it does go back on and you are going to pursue. Our route isnt straightforward and an agent who knows the ins and outs of the system has been a massive benefit to me.
Good luck