Vedder subsequently started advocating for farmers in the media and joined the Netherlands Agricultural and Horticultural Association (LTO Nederland) as chairwoman of one of its chapter organizations.

As a result of her father's changing jobs as a mechanical engineer, Vedder moved regularly during her childhood, living consecutively in Dordrecht, Maastricht, Cadier en Keer, Soesterberg, and Amersfoort.

[4][5][6] She subsequently filled specialist and management roles at the conglomerate Unilever in supply chain, product development, and process improvement including for its ice-cream subsidiary Ben & Jerry's in Hellendoorn.

[10] While at Unilever, Vedder met her future husband Alben, a farmer, and she left the company in 2010 to help him run his dairy farm, which occupies 42 hectares (100 acres) in Ruinerwold in Drenthe.

[4][11][12][13] Besides, Vedder ran a retirement home for horses on their property for a decade, she taught at a center for children with psychosocial disorders and autism, and she restored caravans from the 1960s and 1970s as a hobby.

[2] In September 2016, State Secretary for Economic Affairs Martijn van Dam (PvdA) proposed a system of phosphate rights for the livestock farming sector to limit its production through manure.

In response, dairy farmer Geert Stevens offered his boots to the state secretary in a video, saying a lack of clarity about the exemption would threaten his business.

The following day, Van Dam announced that the European Commission had warned that his phosphate rights system would constitute illegal state aid and that the plans would be delayed by a year.

Vedder joined Stevens' protest and posted a similar video on Facebook, in which she held Van Dam personally responsible for the farmers' uncertainty; it was watched tens of thousands of times.

[18][21] Vedder repeated her concerns at a gathering of approximately a thousand dairy farmers in the IJsselhallen in Zwolle in early November 2016, at which Van Dam explained his policy and considerations.

[22][23] Stevens and Vedder later argued in an opinion piece that cooperation was necessary to provide a future for the sector, and they voiced their support for Van Dam's attempts to fight for his plans at the European Commission.

[28][26] In an interview, she mentioned that she would vote for the Christian Democratic Appeal (CDA), having cast her ballot four years earlier on the People's Party for Freedom and Democracy (VVD).

[33][34] The same year, Vedder handed a manifesto on behalf of young farmers to European Commissioner for Agriculture and Rural Development Phil Hogan, when he was visiting a CDA event in Nieuw-Namen.

[36][37] Vedder participated in subsequent farmers' protests, ahead of which she spoke out against comments by member of parliament Tjeerd de Groot (D66) to halve the number of farm animals in order to solve the crisis.

This policy had earlier been enacted for the province of Groningen, where an oil and gas company has to prove damage is not the result of an induced earthquake to avoid having to pay compensation.

[57] During the campaign, Vedder opposed a meat tax and cuts in the livestock population, and she announced that she wanted to work on sustaining the earning capacity of the agricultural sector.

[a][70] Vedder was re-elected in November 2023 as the CDA's second candidate, and her specialties changed to agriculture, nature, food quality, infrastructure, water management, housing, spatial planning, and gas extraction from Groningen.