[4] After attending school in Nice, he went on to study biology and virology at Pierre and Marie Curie University (Paris VI),[4] where he joined Professor Bernard Dujon's lab.

He earned his DEA degree at the Pasteur Institute in the laboratory of François Jacob, who was awarded the 1965 Nobel Prize in medicine and is considered to be the father of genetic research.

[5] After receiving his doctorate in molecular virology from Pierre and Marie Curie University-Paris VI, André completed a postdoctoral fellowship with Richard C. Mulligan at Harvard Medical School in the Department of Genetics.

Later, while working in the Division of Molecular Medicine at Boston Children's Hospital, he developed the first approaches to meganuclease-based human gene therapy.

[9] [10] Cellectis also has research alliances with a number of hospitals for their UCART clinical trials – among the first being Weill Cornell Medical College and the MD Anderson Cancer Center at the University of Texas.