Lawyer Michael Saltz confirms that Mildred Patricia Baena of Bakersfield is being represented by the firm Jacobson, Russell, Saltz & Fingerman.
The website Radar Online first reported the hire, saying it received a letter from the firm challenging "unflattering reports" about the housekeeper.
Saltz told The Associated Press there is no plan to file litigation at this time. He declined further comment.
Schwarzenegger acknowledged fathering a child with a former household employee.
The woman has been identified as Baena by The New York Times and other media. The Associated Press has not independently verified that she is the mother of Schwarzenegger's child.