Oneto served as councillor at
Porto City Council from 2001 to 2005, becoming the civil governor of
Porto District in 2005, a position she held until 2009. In 2009, as a member of the Socialist Party (PS), she was elected as a deputy in the National Assembly for the
Porto constituency, serving until 2015. In October 2017, Oneto was appointed as Assistant Secretary of State and Internal Administration, a position she held for two years. Returning to the parliament in 2020, she was re-elected in the
2022 election as the fourth person on the PS list for the Porto District. The Socialist Party won 19 seats in the constituency and an overall majority in the Assembly. During her time in the Assembly, Oneto has been a member of the Committee on Constitutional Affairs, Rights, Freedoms and Guarantees and the Committee on European Affairs. ==References==