I think the author is using the term in the more common sense of "good value" as he includes this: > choose the available job option that offers the greatest v

I think the author is using the term in the more common sense of "good value" as he includes this: > choose the available job option that offers the greatest variety of these traits in exchange for career capital - wherein he defines both value and what you're paying for it. I assume that by "career capital" he means the opportunity cost of working for one organisation over another.