Not in detail. The Chief Justice may have up to 5, but it appears that Rehnquist had only 3. I read the article that referenced this in the past 2 days, but can’t begin to tell you where. It was either linked here, the Conservative Treehouse, or in the comments. Cruz was only his clerk for about a year- in 1996. I believe Roberts was later.
What does the job description have to do with it?
I found a good Reuters article that explains what the 36 supreme court clerks do: