A prolific goal scorer since youth, Berglind Björg started her professional career at Breiðablik in the Úrvalsdeild kvenna, the women's football top-tier league in Iceland.

In September 2017, Berglind Björg left Iceland to play for Italy's Serie A club Verona.

[2] On 25 August 2022, Paris Saint-Germain announced the signing of Berglind Björg on a two-year deal until June 2024.

[6] In 2010, Berglind Björg was called for the 2010 Algarve Cup and debuted in Iceland's first match in the competition on February 24 against the United States.

[10] On 22 June 2017 she was included by coach Freyr Alexandersson in the squad that represented Iceland at the UEFA Women's Euro 2017.