On 13 March 1905, she earned the title of expert draftsman issued by the Friends of the Country Economic Society, Teaching Section, School of Governesses and Other Careers for Women and became the first woman in Spain to obtain the degree.
She entered by competitive examination as a telephone operator but in 1899, and thanks to her knowledge of drawing, she became an assistant to the draftsman Juan Marxuach.
When she left the company, she was appointed head of the Plans Section, directing a team that included, among others: Eulàlia Fàbregas, Teresa Torrens and Maria Grau.
Her task was recognized in the publications of the time: "her expertise in the highly useful art that she cultivates, the success and beauty of her drawings, the seriousness with which she carries out her mission have earned her trust and appreciation of the important Barcelona society.
Next Ferrer opened her own school under the name of Drawing Academy for Young Ladies at her home at number 10, Calle de Grasas del Pueblo Seco, Barcelona.