Hélène Rihal began her career at the National Museum of the Renaissance of the castle of Ecouen, and then in the graphic arts department of Valenciennes Art Museum. As a specialist in French drawings of the 18th century and more precisely the graphic artworks of Charles Parrocel (1688–1752), she was involved in the Ecole Nationale Supérieure des Beaux-Arts drawings exhibition and in the writing of the catalogue Une dynastie de Peintres, les Parrocel (2008).
On the strength of her experience and detailed studies in history of art, she joined the Old Master Paintings department of Christie’s France in 2004, before becoming specialist in the Old Master Drawings department in 2006. Among her successes, is the sale of Etude de Chien by Alexandre-François Desportes (€186,000) and of a private drawings collection from 1500–1900 in 2007 (€2,100,000). From 2010 to 2013, she led remarkable auctions such as the collection of a Parisian amateur including around 30 French drawings from the 18th century (€500,000) and Trésors de la collection Veil Picard (€9,700,000).