Role models, mentoring, contextualization—I'm not entirely sure I'd go as far as categorizing it as just career mentoring, but that's definitely a component of it.
The other piece to keep in mind with the whole STEM field is that it's not just trying to prepare people for knowledge-based jobs or the traditional jobs that we often equate with being an engineer or a science teacher. The skills that are developed are the kinds of 21st century skills that we keep talking about as being critically important to employers. The opportunity to do experiential science learning, especially at the elementary, high school, and post-secondary levels, builds many of those kinds of skills.