Pompeo talked with Giuliani on March 26 and then again three days later, the State Department papers indicate.
The revelation could be interpreted as evidence Giuliani was behind a campaign to discredit and then remove ambassador Marie Yovanovitch from her post.
The 61-year-old – who was eventually withdrawn in May – is now a key witness at the president’s impeachment hearing over his dealings with Kiev. She told investigators last week that she felt “kneecapped” by Giuliani in the weeks before her dismissal.
The newly-published documents were released by the State Department to the group American Oversight in response to a Freedom of Information Act lawsuit.
Austin Evers, executive director of the group, said on Friday that they reveal “a clear paper trail from Rudy Giuliani to the Oval Office to Secretary Pompeo to facilitate Giuliani’s smear campaign against a US ambassador,” The Independent reported.
The documents also include a report that appears to summarize a meeting between Giuliani and Ukraine’s former prosecutor general, Victor Shokin, on January 23.
The summary says Giuliani’s two business associates, Lev Parnas and Igor Fruman, were also present.
Parnas and Fruman were arrested last month on charges including conspiracy, making false statements to the Federal Election Commission and falsification of records.
Both had key roles in Giuliani’s efforts to launch a Ukrainian corruption investigation against Democratic presidential contender Joe Biden and his son Hunter.
In the document, Shokin claims he was removed from his position under pressure from Biden.