As a teenager while working in a hair salon as an apprentice, the right place at the right time, he got his first opportunity to style a swimwear shoot for French Elle.

His work has been shown in the Louvre Museum - six black and white portraits styled by Jurnjack were hung there as part of the International Festival of Fashion Photography.

Celebrities he has styled for include Lea Seydoux, Valeria Bruni Tedeschi, Charlotte Gainsbourg, Estelle Deniaud, Mélanie Thierry Jennifer Lopez, Elisa Sednaoui, Rachel McAdams,[19] Laetitia Casta[20] Juliette Binoche, Alicia Keys, Kristen Stewart,[21] Kiernan Shipka.

[23] He has created fashion week runway looks[24] for designers, including Alexander McQueen,[25] Alexander McQueen for Givenchy,[26] Jean-Paul Gaultier, Marc Jacobs, John Galliano, Nina Ricci, Alber Elbaz, Olivier Theyskens, Jeremy Scott, Badgley Mischka, Antonio Berardi, Guy Laroche, Richard Tyler[27] and Kenzo.

[36] IN THE HAIR: A Fashion Hairstylist's Journey of Creativity, his first book was published in French and English in 2017,[37][38][39][40][41] UNEC MAG: Union Nationale des Entreprises de Coiffure, #25 Juillet-Aout 2019[42][43] "Internationalement reconnu, Nicolas Jurnjack a réalisé des coiffures exceptionnelles dont près de 400 couvertures pour Vogue et Harper's Bazaar".