After her study Journalism, Steenhuizen started at
RTL Nieuws. She worked for more than three years on the editorial staff of 5 in the Land and RTL Nieuwsmagazine, the predecessor of Editie NL. In June 2002 she started at Radio M Utrecht as a reporter. Not long after that, Steenhuizen was also allowed to do television work. A few times a month she presented the Bureau Hengeveld program, the investigation program of
Regio TV Utrecht. In April 2005 she presented the news magazine U Today together with Conny Kraaijeveld, Hilde Kuiper and later also with Evelien de Bruijn.
NOS Journaal In March 2009 she became one of the regular presenters of the
NOS Journaal on 3, later NOS op 3, and on 29 September, she presented the NOS Journaal for the first time at 10 pm. Since 1 November 2011 Steenhuizen has been one of the regular presenters on the NOS Journaal. She mainly presented daily newsreels and was a substitute for the Zesuurjournaal,
Nieuwsuur and the late news. Steenhuizen presented Nieuwsuur and the late news for the first time on 13 March 2013. In addition, she presented an extra newsreel about the election of
Pope Francis at 7 pm. On 13 May, she succeeded
Sacha de Boer on the eight o'clock news. Annechien presents during the odd week numbers and Rob Trip during the even week numbers. "Due to family circumstances", Steenhuizen has not been seen on television since September 2024. ==Personal life==