Dictionary

gestionnaire

/ʒɛs.tjɔ.nɛʁ/

noun, masculine/feminine/ʒɛs.tjɔ.nɛʁ/plural: gestionnaires

gestionnaire is masculine or feminine depending on context in French.

manager

From gestion + -aire.

adjective/ʒɛs.tjɔ.nɛʁ/

management; managerial

From gestion + -aire.