Morales told the paper she used fake documents to obtain a job at the Trump golf club in 2013.
The Times reported that Morales has "made Trump's bed, cleaned his toilet and dusted his crystal golf trophies".
Quite an achievement for an immigrant housekeeper living in the country without legal permission.
Victorina Morales told The New York Times she began working at the Trump National Golf Club in Bedminster, New Jersey in 2013, 14 years after entering the United States illegally.
The lawyer representing two undocumented immigrants working at one of President Trump's golf resorts is asking New Jersey officials to investigate their treatment.
Victorina Morales, a native of Guatemala, told the newspaper she had crossed into the U.S. illegally in 1999 and was hired at the club in 2013 as a housekeeper using phony documentation. Diaz explained, "There are many people without papers".
Mr Trump made a crackdown on illegal immigration one of the central planks of his campaign and presidency.
The revelations by the New York Times are in stark contrast to President Trump's stance on illegal immigration.
But she told the newspaper that she was hurt by his comments disparaging immigrants here illegally as violent criminals.
Finally, she chose to speak out.
The Times story says that there is no evidence that the Trump Organisation knew the two were did not have legal documents, but the women say at least two supervisors were aware of their status and helped them evade detection. "We sweat it out and attend to his every need and have to put up with his humiliation".
The Times also examined the documents Morales presented as proof that she was entitled to work - a permanent resident card, or green card, and a Social Security card, both of which she said she purchased from someone in New Jersey who produced counterfeit documents for immigrants.
Morales said she chose to speak out because she felt exhausted of the president's unceasing vilification of immigrants.
Morales expects that she and her colleagues will lose their jobs over this, but said they're willing to pay the price to come forward.
However, Keith Boykin, a former White House aide under the Clinton administration, pointed out Trump's pattern of outsourcing labor for his products and bringing in seasonal workers from across the border to staff his businesses despite his outrage over illegal immigration.
Her lawyer, Anibel Romero, has called for federal and state investigations into the matter. In addition to calling for a wall on the Mexican border, he has urged companies to screen workers more carefully.