Helena has had a varied and inspirational career, most-well known as a fashion model she is also a designer and photographer. She has appeared on many magazine covers and in fashion campaigns including Victoria's Secret catalogue and in their television commercials. With strong creative skills Helena has built a successful career in various other fields and works to raise funds for charity. In 1999 she was creative director of Nylon magazine at its founding by publisher Marvin Scott Jarrett. She also launched her own clothing line, Christensen & Sigersen, with life-long friend Leif Sigersen. The pair previously ran Butik, a shop in New York's West Village. She also sold some of her vintage clothes line in her mother's store, the Yo-Yo Second Hand Shop, in Copenhagen. Helena is also a photographer whose work has appeared in Nylon, Marie Claire, and ELLE. Her exhibition "A Quiet Story", curated by Jim Cook, premiered in at the Locus Gallery in Rotterdam, 2006, and HotelArena in Amsterdam, 2007. Her exhibition "Far From, Close" appeared at Dactyl Foundation in 2008/09, to benefit International Center of Photography educational programs and Chernobyl Children's Project International. Helena launched the second Fashion Targets Breast Cancer campaign which involves the sale of exclusive designer t-shirts to raise millions for Ireland's Action Breast Cancer and Europa Donna Ireland to help younger women with breast cancer.