As of January 1, 2015 there is no longer a list of qualifying occupations. There used to be a list of fifty qualifying occupations of which you must work full time continuously full time for one year, but with the new start of Express Entry that is no longer the case.
The Federal Skilled Worker program does still exist but now you must apply under the Express Entry. You will require to have worked continuously for a total of 1,560 hours (30 hours per week) full time or part time to the same total of 1,560 hours (either 2 jobs at 30 hours a week, or 15 hours a week over 2 years (24 months)) The job would have to be in the same skill level, and be at the skill level of 0, A, or B according to the National Occupational Classification.