The move follows Secretary of Defense Esper's guidance to all service branches to stop using photographs in promotion boards.
Investigators interviewed more than 60 witnesses, according to the report obtained by Military.com.
In mid-September, about 350 lieutenant colonels and colonels will go through the Colonel Command Assessment Program.
Defense Secretary Mark Esper said personnel leaders are eyeing options to eliminate unconscious bias from promotion boards.
Vindman was a key witness in President Donald Trump's impeachment inquiry.
The moves are meant to eliminate "discrimination, prejudice and bias in all ranks."
Sen. Duckworth said she would block a promotions list with 1,123 names on it until she had confirmation.
Another military branch is reviewing whether it should do away with promotion photo requirements.
As the years go by, the stakes get higher and sometimes promotions come with more hassle than you want. How do you go about...
Bias in hiring and promotion decisions has been well documented.
The campaign of President Donald Trump released a letter from 235 retired senior officers backing his re-election.
The news comes four years after the Air Force laid out initial plans for what its future fighter jets might look like.
The recent exercises were one of many the Air Force is conducting to test its Advanced Battle Management System.
A veteran of the Marine Corps and Army National Guard, he went through boot camp more than four decades ago.
Cmdr. Robert Arias is at least the third Navy commander removed from his job in recent weeks.