Papers filed at New York’s Southern District Court and signed by Ms Sternehim, stated that she "hereby appears as counsel for defendant Ghislaine Maxwell", according to the site.
Ms Sternheim's most high profile client is Khaled al-Fawwaz, a lieutenant of the al-Qaeda chief. The terrorist was jailed for life in 2015 after being convicted of conspiracy for his role in the 1998 bombings of two US embassies in Africa that killed 224 people.
Al-Fawwaz, who lived in London, has been described as Bin Laden's spokesman in the UK's capital city.
At the time of his conviction, a statement from Preet Bharara, the US Attorney for the Southern District of New York, said Al-Fawwaz had "played a critical role for al-Qaeda in its murderous conspiracy against America".
Ms Sternheim also represented Minh Quang Pham, a former London McDonald’s worker who plotted a suicide bomb attack at Heathrow Airport.
Maxwell has pleaded not guilty to charges that she recruited three girls, including one who was 14, and joined Epstein in the abuse in the 1990s.
The 58-year-old socialite was arrested in July.