This article seeks to answer two questions: what kinds of expertise are needed to lead an effective dissertation boot camp; and how can those outside the graduate student's discipline support their writing? Drawing on four years of application data and post-camp interviews, I reveal how writing process knowledge--similar to that described in the scholarship on first-year composition--is a fundamental reason dissertators seek help from the boot camps. Ultimately, the article argues that the importance of writing as a dissertation-related threshold concept should be clearly stated and understood across all disciplines: doctoral researchers continue to learn and practice writing. As part of broadly accepting this threshold concept, it becomes clearer that those trained in writing pedagogy and its theories are best situated to lead the most helpful writing-process style boot camps.