After realizing that she could make a living from her hobby, Hammer went on to do the makeup of runway models for designers including John Galliano and Jasper Conran.

[citation needed] Hammer has worked as a makeup artist on models and celebrities including Sharon Stone, Kate Moss, Rosie Huntington-Whiteley, Naomi Campbell, Meghan Markle, Rita Wilson and Tom Hanks.

[4] Hammer has worked on advertising campaigns and television commercials for international brands such as Oil of Olay, Pantene and Head & Shoulders.

She has been asked to launch products, advise on new looks and train personnel for Estee Lauder, Clarins, Clinique, Aveda and Revlon.

[5] Hammer's television credits include The Clothes Show, BBC Style Challenge, Britain's Next Top Model, GMTV, This Morning, Beautification and 10 Years Younger, where she was the resident makeup artist for 3 series.