Submitted applications through their online careers page. Resume bounced between groups in multiple locations over the span of the first 6 months before it landed in the best fit. Interviews consisted of a couple of one on one calls with HR and hiring managers and ended with an official interview day with a presentation and multiple rounds of team interviews. The technical staff and hiring managers were pleasant to interact with and made the experience enjoyable. I communicated a lower bound on expected compensation, defined as my current salary at a another national lab in the same state, to HR early in the process. They proceeded with interviews for 6 months, but came back with an offer more than $20k lower than what I was already making (which is already below market). Upon request, I provided the hiring manger with additional inputs to help write a justification memo for an appeal. The comp team's counter was only $2k higher with some additional sign on, making the entire effort a huge waste of everyone's time.