Christopher Steele, a former British Intelligence officer who works for a private security firm, produced the dossier about President-elect Trump that contained unverified allegations about reported ties to Russia, according to a new report.

Steele, who is a director of Orbis Business Intelligence, a London-based private security firm, prepared the dossier, which has come under fire from the president-elect and his allies since BuzzFeed News published it Tuesday. The dossier alleges that the Russian government has evidence that could compromise Trump and leave him open to blackmail, and that members of the president-elect’s team met with Kremlin officials during the campaign.