Yes, if you maintained a genuine professional relationship and they know your candidacy well enough to support you.

Reference the previous process, explain what has changed and ask whether they would be comfortable advising you on the reapplication.

Let the referral emerge naturally rather than assuming that because they interviewed you once, they must recommend you.

A prior interviewer can be a strong contact because they have direct evidence of your interview performance. For more detail, see the consulting reapplication guide.