She served as Croatia's Minister of Environment from 2011 until 2012, the first and to date only woman to hold this position.

[2] From 23 December 2011 until 13 June 2012 Holy was Minister of Environmental Protection and Nature in the centre left Government of Zoran Milanović.

She resigned her position on 6 June 2012 after an outcry over an email in which she asked manager of the HŽ Holding to consider the possibility of not firing his secretary, because she was an elderly woman with more than 15 years of experience, and was working in HŽ Holding for less than a month.

After her departure from SDP, Holy founded a new party called ORaH (ORaH means walnut in Croatian) which stands for Održivi razvoj Hrvatske (Croatian Sustainable Development).

[5] She is one of the most recognizable Croatian female politicians and a notable supporter of LGBT and women's rights.