I'm writing up a STEM postdoc application and the major component is a lengthy research proposal. I'd like to speak to my specific strengths in the area and provide examples (some of which may not have associated publications), but I'm not sure about language choice. I'm aware of this SE question, but that's more for journal publications. It's easy to say "we" in a journal article, even if I did all the work, because my PI's name is always last author.
Some proposals I've seen have included language like "the applicant's expertise in..." or "this researcher's previous investigation into..." but that seems inelegant and forced. What's the best way to do this?