Sivrière was born in Paris in 1975.[1] She studied jewellery making at the Haute École de Joaillerie in Paris[1] and, upon graduation, worked as a freelance jeweler on Place Vendôme.[2][3] Sivrière joined Piaget as a jewelry designer in 2002.[3] She became the director of jewelry creations in 2011[1] and was assigned responsibility for Piaget's entire watch department in 2017.[2]
Sivrière oversees both jewellery design and watchmaking,[4] managing a studio team of 9 craftspeople.[5] She has stated that there is "no difference between designing timepieces and crafting jewellery",[6] noting how most people at Piaget start with watchmaking before moving into jewellery, compared to her own career where she started as a jeweler.[7]
Sivrière has cited a return to the fashion of the 60s to help revitalize Piaget's style.[8] She is also involved in the sourcing of gems and jewels needed for manufacturing.[9]