She was already a directly elected member of the German Bundestag from 2009 to 2010, and from April 2010 until her resignation in December of the same year, State Minister for Food, Agriculture, Consumer Protection and Regional Development of Lower Saxony.

[2] During her apprenticeship she worked (partly as an intern) in the food industry, the bakery and butcher trade, in canteen kitchens, in retirement homes and in agriculture.

In 1990, she joined the then-family business of her in-laws, Germany's second largest turkey hatchery Ahlhorn, and in 2001 she took over the management together with her husband Garlich Grotelüschen.

In the 2009 general election, Grotelüschen won the constituency Delmenhorst - Wesermarsch - Oldenburg-Land in Lower Saxony with 35.3% of the first votes and thus directly entered the Bundestag.

[8] In the general election on 22 September 2013, Grotelüschen reappeared in her former constituency, prevailing narrowly with less than 700 votes ahead and thus entered the 18th German Bundestag, which she was a member of since its formation in mid-October 2013.