Whatever the challenges ahead, the organizations say they are more than ready. They recently joined former government officials in urging that the White House accept 10 times the number pledged.

“We are ready for 100,000 Syrians,” said Sarah Ivory, the regional relief director for Church World Service, which resettled Mr. Al Roustom. “Ten thousand is barely more than we already anticipated. It’s not some big ratcheting up of our program.”

The government gives local offices of the nine aid organizations $1,975 per refugee to cover initial rent, clothing and food, in addition to covering administrative costs for the national offices that comes to an average of $270 per refugee, the State Department said.

The local offices also register children in schools, provide access to medical care and provide cultural orientation. The government contracts are standard, down to the number of forks, knives and spoons that must be provided for each refugee (two).

On April 15, as Mr. Al Roustom sat in a Jordanian refugee camp, he had no idea that a committee was deciding where he would start his life. Representatives from the nine organizations took part in a weekly Wednesday meeting in Arlington, Va., reviewing a spreadsheet of names and data that would become animate in a matter of months.

Somewhat like a draft conducted by professional sports teams to choose players, each organization selects a prescribed number of refugees in several rounds, with the order rotating every week. They select cases depending on whether an applicant has a relative or a friend near an aid group’s field office. If not, they consider an applicant based on languages spoken, whether others from that country live nearby (there is a large Syrian community in Paterson, N.J., for example), medical concerns and other specific issues, such as sexual orientation. Only two of the nine agencies have resettled Syrian refugees in the New York area, in part because of the high cost of living.