Clauson was discovered on an open casting call in Los Angeles, of which Ford Models signed her on the spot, a "surreal" experience she recalled. Clauson started modeling at age 14, appearing in ad campaigns for Wild Fox Couture, Jag Jeans and in the Forever 21 catalog.
Later in 2009 she left Ford Models and signed with Marilyn Agency. That same year she was featured Model of the Month in the October issue of Japanese Vogue. On September 2010 she made her catwalk debut at the spring ADAM show in New York and also walked for Zac Posen and Calvin Klein.
Clauson's debut season yielded such sensational results that MODELS.com listed her to be one of the Top 10 Newcomers for fashion week Spring/Summer 2011.
In January 2014, model Hailey Clauson is the focus of an Agent Provocateur ad campaign called "Behind Closed Doors," which was photographed by Miles Aldridge.
As an actress, She is known for Hailey Clauson Says YES to an Instagram Proposal (2017), Love Advent (2011) and Life + Times: Empire State of Mind (2011).