Shoot! I overlooked your post, Jenna! Sooooo sorry!
When you search, make sure you’re using the Member Search form and not the general site search.
If you can’t find them, try filling in just their first name and leave the last name blank. You’ll get more results depending on how common their name is, but it’ll be easier than looking through the whole directory.
If that doesn’t work, let me know who you’re looking for. There’s always the possibility that there’s a problem with our search that needs some IT attention. 🙂