Hi guys;

I think this will be an exciting topic and i am sure that u will help me on this guys. We are thinking of employing a guy who has knowledge in refrigeration. Well speaking precisely about a refrigeration engineer who can help us in selling refrigeration spare parts, (refrigeration + sales) engineer. I heard that hiring refrigeration engineers is not cheap but what i am worrying about is How do i know that this is the right guy ? What education field is right ? Good certificates to consider ? And when interviewing by phone or personally, How can i get the impression that he is the right one from ? I am an engineer and i really appreciate the work of good engineers, especially when they convey their thoughts and opinions in an organized and attractive way.