Soprano, mezzo-soprano and teacher who spent her career in France.

Germaine Sanderson was the adopted daughter of Anne Marie Lemaitre. She gave singing, vocalisation and recitation classes to many students, including the Argentine writer Victoria Ocampo in 1908, the Canadian singer Enid Gray, and the French soprano Yvonne Gall.

Germaine gave concerts with the violinist Yvonne Astruc in 1911, and with the Orchestre de la Société des Concerts at the Lyceum-Club in Paris the following year. Her recitals often featured music by Henri Duparc, Reynaldo Hahn, Lili Boulanger, Jane Vieu, and Charles Koechlin, who dedicated the song "Pluie au matin" (1908) to her. She also performed with Gabriel Fauré on numerous occasions, who dedicated the song "Quand tu plonges tes yeux dans mes yeux" (1914) to her, and they developed a close friendship. On February 27, 1912, during a concert series at the Salle Érard in Paris, Fauré accompanied her on the piano and together they performed his piece "Poème d'un jour". She also sang Maurice Ravel's "Ronsard à son âme" with the composer in Paris in July 1924. She received positive reviews from French critics, and her recitals with the pianist Madeleine Grovlez were a huge success. In the 1920s she sang at the Concerts Colonne, conducted by Gabriel Pierné.

Sanderson contacted Manuel de Falla from Paris, asking about the orchestration of "Siete canciones populares españolas" and explaining that she was working on that piece with Ricardo Viñes. Her letter also mentioned that she performed "Trois mèlodies" at her concerts. On March 10, 1923 she performed "Siete canciones populares españolas" at the Salle des Agriculteurs in Paris; the event, arranged by Concerts Dandelot, also featured the pianist Jacques Février and the guitarist Emilio Pujol, who played Falla's "Homenaje. Pièce de guitare écrite pour 'Le tombeau de Claude Debussy'". In 1934, she supervised the music section of the lecture series held at the Palais Royal in Paris, organised by the Institut International de Coóperation Intellectuelle; and in 1940 she created the folklore studies department at the Conservatoire de Versailles with the collaboration of Amis du cinéma documentaire.