1) Can you confirm this please. “Dr. Dourson’s title is adviser to the administrator,” an EPA spokesman said yesterday evening.

We will refer you to this story in USA Today: https://www.usatoday.com/story/news/nation-now/2017/10/18/controversial-nominee-not-yet-confirmed-already-working-trumps-epa/778310001/

2) Can you tell me what day he started in this role, please.

E&E News reported this and you should cite them: https://www.eenews.net/assets/2017/10/19/document_gw_05.pdf