Most of the new testing has pointed toward already-identified victims of the terror attacks.
It is the first identification made since March 2015.
New York City's medical examiner said Monday that the man has been identified as the 1,641st person killed at the World Trade Center on September 11, 2001, PIX11 reports.
The victim will not be publicly identified at the family's request, the New York City medical examiner's office said on Monday.
The office was able to do the retesting with DNA technology acquired earlier this year, spokeswoman Julie Bolcer said.
The medical examiner's office in the city said advancements in DNA testing had allowed for a positive confirmation of the man's identity.
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France has been on high alert since a series of terrorist attacks in 2015 and 2016 that left more than 230 people dead. Sources told RFI that the unidentified man shouted "Allahu Akbar" - "God is great" in Arabic - during the incident .
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As DNA testing propelled, so has the multimillion-dollar push to interface more than 21,900 bits of stays to singular casualties.
In 2013, authorities sifted through truckloads of debris unearthed by construction crews working on the rebuilding. Most of the DNA profiles generated belong to previously identified victims.
Investigators were unable to recover scores of bodies trapped in the rubble, and the effects of heat and chemicals like jet fuel have further complicated the identification process.
In some cases, scientists have gone back to the same bone fragment 10 or more times, hoping new technology will provide answers.
Almost 3,000 people were killed in the depraved 9/11 attacks in which brainwashed jihadists crashed hijacked airliners into buildings.