The United States government revealed the identity on Tuesday of an Islamic State operative believed to have been one of the overseers of last year’s attacks in Paris, as well as of the coordinated suicide bombings that tore through the international airport and a metro station in Brussels this year.

The operative — who until recently was known only by his nom de guerre, Abu Souleymane al-Faransi — is a 27-year-old originally from Morocco whose real name is Abdelilah Himich, according to a statement issued by the State Department, which announced his designation as a global terrorist. The listing describes Mr. Himich as a senior fighter and “external operations figure,” a reference to his suspected role in planning attacks abroad for the Islamic State, also known as ISIS or ISIL.

“Himich created the Tariq Ibn Ziyad Battalion in 2015, a European foreign terrorist fighter cell that has provided operatives for ISIL attacks in Iraq, Syria and abroad,” the statement said. “Himich was also reportedly involved in the planning of ISIL’s November 2015 Paris attacks and March 2016 Brussels attacks.”

The assault on multiple locations in Paris on Nov. 13, 2015, was led on the ground by Abdelhamid Abaaoud, a Belgian member of the Islamic State who traveled from Syria and maintained telephone contact with the various teams of attackers. He was killed in a police shootout days later.