You're supposed to submit letters of recommendation for jobs you're applying to. It's probably obvious that if you're ABD or just deposited your dissertation, that your letters should come from members of your dissertation committee. But many philosophers are applying for jobs several years or more after completing their dissertations, having gone through visiting positions, adjunct teaching jobs, post-docs or even tenure-system jobs that didn't work out. Moreover, in that time, you have likely finished some articles, developed new research that you perhaps value more than your dissertation work, taught new courses and improved your teaching, and simply become a better professional than in your ABD days. But during this post-dissertation time, you may not have kept in touch with the members of your dissertation committee. Even if you have, they might not really know about how well you've improved or what directions you've developed in. So, a few years or more after completing your dissertation, are your committee members' letters still relevant? Obviously some are to the extent that they attest to the work you did then. However, shouldn't you also have letters from folks who have seen what you've been able to do, and where you're going, since completing your dissertation? Perhaps the chair of a department you taught in as an adjunct, or your faculty mentor for a post-doc? But then these people may nonetheless only be able to provide short-term, limited feedback on the sole dimension of your work that they got to know, such as just your teaching, or just the research trajectory you pursued in your postdoc. So, who should your letters come from? Should they always be your dissertation committee members, forever? Is there something you can do to help letter writers become updated as to your most recent accomplishments and directions? Should you solicit new letters from people who have gotten to know you since graduation? Is there some decision tool for figuring this out each year you're on the market?