Hi CK
I think it depends on how big the brand is. There is a big difference between say, KPMG and Mr & Mrs Smith down the road. If it's a big brand that people know about then I would use Accountancy Positions - KPMG orCareers in Accountancy - KPMG or Accounting Jobs - KPMG (some keyword research will be needed to here to establish the most searched for terms) .
If it's a smaller company or local company I would probably name the page "Careers In Accountancy | Open Jobs & Positions | OurBrand' - so keeping the primary keyword as 'Careers in Accountancy' followed by a secondary of a couple of semantics, followed by the brand.
If you are a local business then I would add the location in there as it could be quite important if the distance is a consideration. So maybe: Accountancy Careers | Jobs & Positions | OurBrand - Location' Then support that with a strong Description and the on-page H1 should echo the primary keyword or close semantic and the on-page content which enhances that. Don't forget a nice little image with the primary KW in the alt tag and you're all good to go.
Regards Nigel