[5][6][7] In January 2016, with Keflavík in third place, the board terminated its contract with Margrét,[8] stemming from a rift between her and two players,[9][10][11] including key-player Sandra Lind Þrastardóttir.

[12] On April 18, 2018, Margrét was hired as the head coach of Breiðablik, replacing Hildur Sigurðardóttir.

[16] On 21 August 2019, Margrét was hired as the head coach of Stjarnan women's youth teams.

[17] Prior to the 2020–21 season, Stjarnan fielded a women's senior team again with Margrét appointed as head coach.

In October 2020, she was criticized for taking the team on a training trip to Hrútafjörður when all practices and games where barred in the capital region due to another Covid-19 outbreak in Iceland.