A youth care worker at an Arizona shelter for migrant children has been convicted of sexually abusing teenagers who were under his supervision, federal prosecutors said on Monday.

After a seven-day trial, the worker, Levian D. Pacheco, 25, of Phoenix, was convicted on Friday by a jury in United States District Court of seven counts of abusive sexual contact and three counts of sexual abuse of minors, the prosecutors said in a statement. He will be sentenced on Dec. 3.

“Ensuring the safety of all individuals held in federal custody is of utmost importance to this office,” Elizabeth A. Strange, the first assistant United States attorney for the District of Arizona, said in the statement.

She said the verdict would send a message “that these crimes will not be tolerated.”

The jury convicted Mr. Pacheco of abusing seven teenage boys, some on more than one occasion, who were being held in detention pending possible deportation at Southwest Key’s Casa Kokopelli, a federally funded center in Mesa, Ariz., from late August 2016 through July 2017, prosecutors said in the statement.