Early in my career, I decided to transition away from mechanical engineering and applied for programming jobs. Many companies refused to even talk to me. But for one that did set up an interview, I brought in listings of software I'd written. I basically ran the interview, bringing out the listings and explaining what I did, and I got the job.
I've interviewed many candidates, and it surprised me that pretty much none of them would take the initiative and sell me on what they could do. They'd passively wait for questions and then answer the questions.
