which position (Scientist or Sr. Scientist) should I apply?

I have Ph.D. degree and 5 years of postdoc experience and now working as a Sr. research investigator at a University. No industry experience. I know there is barely no opening in Big Pharma, but want to try it. Different companies have different names for positions, byt generally which one should I apply? 1. Scientist; Ph.D. degree (or equivalent) with 0-3 years post-doctoral experience