u/EconomicsNervous5643

Hey Guys, I've been asked to come into the SEL office for an onsite interview. I have previously completed my HR screening and 2 technical interviews. The role is a design engineer role which is also customer facing. I want to know
- what to expect for an onsite interview
- how do i prep to ace this interview
- what are they specifically looking for?
-Do's and don'ts

Any help on this is really appreciated, I have never before given an in person interview