Explaining Reasons for Staying So Long $$$

I do think I have a lot of transferrable experience. I am just wondering though, how and when did you prove to frog that you could transfer your experience? Was this before you were hired? After you were hired by “doing the work”? In either of those cases, how did you manage to prove it?

Thanks for the advice! Definitely looking at this as a design project. More topics/questions to come.