It may be worthwhile, following completion of your psych major (degree), to then do your honours in psych then masters in organisational psych (to get registered as a psychologist). This would open up a few avenues namely to either practice as an independent org psych (or work for one) or to be an inhouse resource as a psychologist with a large corporate. Opportunities would exist in consulting (org change), coaching, leadership development, psychometric testing and other aspects such as Employee Assistance (to use your clinical skills) and Outplacement to name just a few things. I suppose it depends whether becoming a psychologist is important to you or whether moving to an
HR focus is more appealing. If you choose
HR, having your psych degree will hold you in good stead and will open up some doors. My advice is to try and think about your longer term prospects / desires and then pick up the post grad option(s) that fit with the decision.
Regards
Chris St Clair