Coulthart has broken stories about UAP programs and whistleblowers. His reporting has focused on the US government's alleged retrieval and reverse‑engineering of non‑human craft.

Coulthart has worked as a journalist for Australian television networks and has won multiple awards for investigative reporting.

Notable works: In Plain Sight, numerous television reports and articles.

Representative statement: Coulthart has stated that there is overwhelming evidence of a government cover‑up regarding UAP and that the phenomenon is real.

Coulthart is regarded as a serious journalist who applies rigorous investigative standards to the UAP topic. His work has contributed to the mainstreaming of the discussion.

Coulthart's reporting has influenced the global conversation on UAP disclosure.