The Indiana Republican, 73, has made four spins through the capital's avenues of power and has become wealthy in the process. Since the early 1980s, Coats either has served in government or earned money as a lobbyist and board director.
His most recently available Senate financial disclosure, from 2014, shows he had a net worth of more than USD 12 million.
In and out of government, Coats dealt with intelligence, which he would oversee for the Trump administration if confirmed by the Senate. Announcing his selection on Saturday, Trump cited Coats' "deep subject matter expertise and sound judgment" and government service but did not mention his lobbying.
He resumed government service in 2001 as ambassador to Germany under President George W. Bush. In 2005, Coats returned to the United States, and to the influence industry, as a lobbyist on behalf of some of the country's biggest companies, including defense contractor Lockheed Martin Corp.
More From This Section
Five years later, he successfully ran for his old Senate seat.
Coats said he personally did no foreign agent work for those countries while he was at Verner. He said his involvement on behalf of foreign governments was limited to India.
And then to come back into the government it can be a tough task for any person to basically now bite the hand that fed you."
Trump aides stressed that Trump's lobbying policies are foward-looking. Spokesman Sean Spicer said Trump was hiring the most qualified people for his administration.