Brother of Impeachment Witness Says His Firing Was a Whistle-Blower Reprisal

He was told Mr. O’Brien and Mr. Gray had directed aides to use “official time for personal errands including scheduling haircut appointments, retrieving personal luggage and to coordinate personal dinner arrangements.”

In January, not long before he was fired, the complaint said, Colonel Vindman spoke with a colleague detailed to the White House from the Defense Department who claimed that Mr. O’Brien and Mr. Gray “engaged in demeaning and demoralizing sexist behavior against her and multiple other female N.S.C. professionals.” She told him the men commented inappropriately on their looks, talked down to them and left them out of key meetings, and shared accounts from several senior aides.

Dwrena Allen, a spokeswoman for the inspector general, said he had received the Democrats’ letter requesting an investigation and was reviewing it.

Alyssa Farah, a White House spokeswoman, called Colonel Vindman’s claims “ridiculous and false.” She said Mr. O’Brien’s National Security Council had the most female senior leaders ever, and accused Colonel Vindman of making “attempts to retaliate against his former supervisors for providing an accurate assessment of his performance.”

“These allegations are an example of precisely what’s wrong with Washington — a junior-level disgruntled former detailee, with whom Ambassador O’Brien had almost no interaction, can launch baseless attacks for partisan purposes,” she said.

Yevgeny Vindman never testified before impeachment investigators in the House, but he appeared in person to support his brother, a Ukraine expert for the National Security Council, as he delivered a scathing public account. The brothers also privately raised concerns with top White House lawyers about Mr. Trump’s conduct on the infamous Ukraine call, in which the president pressured the country’s leader to conduct investigations that would benefit him politically.

The account by Yevgeny Vindman, who is still an active-duty officer, surfaced as the White House is once again under scrutiny for openly flouting ethical requirements and the government norms that were carefully followed by previous administrations. It was only the latest reminder of how, despite Mr. Trump’s impeachment, he has continued to blow past such rules and customs — including efforts to avoid even the appearance of reprisals — more or less without consequence.