For +15 years, Gallen worked profusely as a creative and art director, designer and curator within the fields of Arts, Film, Fashion and Culture developing artistic and commercial work, often pushing the boundaries between both. A gaining national and international recognition resulted in the artist becoming face and ambassador of fashion brands like Converse or Reebok, among other numerous sponsorships and creative collaborations. For four years, Gallen also teached at the Fashion Communication Masters at Instituto Europeo di Design (IED) in Madrid. Nowadays, though focused on her film career and her side art projects, she is head of the Newsroom at FREEDA Media, a leading company in social media for women, where she writes for gender equality, human rights and queer culture. Her first book El Diablo es una mujer was published by Lunwerg (editorial Planeta) in late 2021.