[1] Maria da Luz Rosinha was born on 13 May 1948 in Vila Franca de Xira, a municipality in the Lisbon District, in Portugal.

[1][2] In 1975, Rosinha joined the Portuguese Socialist Party (PS) and became active in local politics in Vila Franca de Xira.

[1] After ceasing to be mayor, she held several positions, including on the board of the regional tourist body for Lisbon and the Tagus valley; vice-president of the Lisbon branch of the National Confederation of Family Associations; and president of the council overseeing the development of the Vila Franca de Xira hospital.

She was re-elected in 2019 and, again, in January 2022, when she was 9th on the PS list, with the party winning 21 seats in that constituency and securing an overall majority nationwide.

Outside of parliament, she is president of the board of trustees of Fundação CEBI, a social welfare and development organization based in Vila Franca de Xira.