"has assigned him" is grammatically correct and can be used in written English.
It is commonly used to describe a situation where someone has been given a specific task or responsibility. Example: The CEO has assigned him the task of preparing the company's annual report.
Since Infosys has assigned him no work at all since last April, he received no bonus for 2011, losing one-third of his income.
But because he believes the C.I.A. has assigned him the job of committing to photographic memory all the streets in all the major cities of the world, Thomas has a bit of a credibility problem.
In particular, Löw has already shown he is not too proud to take advantage of Lahm's increased exposure to midfield roles and has assigned him similar duties when on international duty.
As Ruby and Tonya tug at him, a pal named Mister (Monté Russell) abets him and Elmore agitates him, King Hedley II finds himself locked into the destiny his deprived upbringing has assigned him.
The police, however, could not find any teacher who had assigned him such work.
A miscount, claimed King: Morgan had assigned him an extra wife.
Video by Laurence Mathieu-Léger Goodecidedcided to write a letter to the judge, John Mosely Jr, who had assigned him the case.
Vedenin, a lawyer for Gorbuntsov and the Antonovs, said Scotland Yard had assigned him guards after the attack.
It had been just as inconceivable to him that Cao would confound his theory of human nature by stepping out of the role that Vann had assigned him.
Mr. Gousse was interviewed at a Lower Manhattan diner near a U.P.S. center where the company that employs him, Adelis International Security, had assigned him as a guard.
Cao had assigned him an ARVN soldier as a driver, but Vann would put the soldier in the back seat with a carbine.
