She graduated in Science with an extraordinary award in 1921 and, a few months later, became the first Spanish scientist to embark on an oceanographic campaign. The expedition, by the Spanish Oceanography (IEO), took place aboard the ship Giralda, lasted a month and traveled the Spanish coasts of the Mediterranean. Jimena worked as an assistant to French oceanographer and naturalist Julien Thoulet.
Jimena continued to form and her concern took her, firstly, to the University of Paris and then to Columbia, where she studied Physical Geography of the Atmosphere and Oceans with some of the best scientists of the time in the field. Although she dominated many fields of marine sciences, Jimena's specialty was physics and that was what most of his short career was devoted to: the study of the ocean's bodies of water, its temperature, salinity, currents...
She worked in several institutes as a teacher until the Civil War came and, in 1940, the Franco dictatorship ceased her positions and kicked her out of the IEO.

In 1922 she traveled to the laboratories located in Malaga to investigate the biology of molluscs. From this study was born her first scientific article, first article in addition to signing a woman in Spain in this field.
Jimena continued to form and her concern took her, firstly, to the University of Paris and then to Columbia, where she studied Physical Geography of the Atmosphere and Oceans with some of the best scientists of the time in the field. Although she dominated many fields of marine sciences, Jimena's specialty was physics and that was what most of his short career was devoted to: the study of the ocean's bodies of water, its temperature, salinity, currents...
She worked in several institutes as a teacher until the Civil War came and, in 1940, the Franco dictatorship ceased her positions and kicked her out of the IEO.
She survived the Civil War, but her scientific career and struggle for equal rights was truncated. In 1966 Jimena obtained a pardon from the Franco government and obtained her re-entry into the IEO, but already as a retiree.

She was a pioneer woman in marine sciences as she was the first Spanish scientist to board an oceanography campaign and then, at only 22 years old, she passed some exams and joined the IEO laboratory in the Balearic Islands, becoming the first scientist woman in the history of the institution.
In addition to science, Jimena devoted her life to politics and the fight for equal rights for women. She chaired the women's committee of the Partido Republicano Radical Socialista before women even had the right to vote. But Jimena began to struggle in her work and temporarily she started to work as a teacher.