My name is Daniel Tunkelang, and I work at LinkedIn. Before that, I worked at Google. And before that, I was a co-founder and Chief Scientist at Endeca. My contributions to Wikipedia reflect my expertise in information science and information retrieval. In particular, I am the primary author of the Human Computer Information Retrieval entry, and I have rewritten the Relevance (information retrieval) entry.
If you feel the need to contact me personally, my email address is dtunkelang at gmail dot com.