Fermilab and the Universities Research Association invite submissions for the 21st annual URA Thesis Award competition. Nominations must be submitted to Lenny Spiegel at lenny@fnal.gov by March 16, 2018 and should include two letters supporting the merits of the thesis being nominated. At least one letter should be from a member of the thesis committee of the PhD granting institution and, for work carried out in collaboration with Fermilab scientists, at least one of the letters should come from one of those scientists. For further details consult the URA Thesis Award website at https://www.ura-hq.org/awards/ura-graduate-thesis-award/.