Numainville, 29, raced for Cervelo Bigla for two seasons and during her career she has won two elite women's national titles in the road race and time trial, and has stood on the podium at Tour of Flanders, Tour de l'Ardeche, Philadelphia Cycling Classic, Winston-Salem Classic and GP Plouay.
Sheyla Gutiérrez, 22, has re-signed after completing her first season with the American outfit. She was second overall in the U23 category in Women's WorldTour and finished her season with an eighth place at the elite UCI Road World Championship.
The team aims to keep developing her skills in the coming year. "It was her first year as a professional at this high level, and she continued to improve all year," team director Manel Lacambra said. "Using her bold character and fearless form, Gutiérrez found steady results across the UCI Women's WorldTour Calendar."
The team also announced signing Dani King from Wiggle High 5, Malgorzta Jasinkska from Ale Cipollini and Willeke Knol from Lotto Soudal Ladies.