She served as the Prime Minister of Northern Cyprus between 13 June 2013, following the fall of the government of İrsen Küçük in a vote of no confidence, and 2 September 2013.

[1] As of November 2015[update], Siber was the Speaker of Parliament, the Assembly of the Republic of Northern Cyprus.

She would later recount her primary fear during childhood as travel, as many Turkish Cypriots went missing while on the roads, but highlight the peaceful interaction between the two communities in the mixed village of Tremetousia.

[4] Siber was admitted to the Cerrahpaşa Medical Faculty of Istanbul University when she was 16, at a time when political incidents involving students were at their height.

[6][7] She completed her specialization in internal medicine in the Şişli Etfal Hospital in 1987, returned to Cyprus and started working at her private clinic.

She met her husband, Dr. Rıfat Siber, a urologist, while she was working as a volunteer in the Dr. Burhan Nalbantoğlu State Hospital after her graduation.