similar question need NOFREE help,THANK you!!!!!!

I graduated from Master of Finance in a low-ranking school in US.
I hope do Accounting work.
But many firms do not offer me opportunity because my major is not accounting.

HELP!!!do i need another Master Degree in accounting?
or just join CPA exam is ok for me?
But after years if you need a better job offered by big4,you must be hold
an accounting degree ,right?

thanks everybody.