The profession of biologist has the status of a regulated profession, with legally recognized professional competencies, which are set forth in the Statutes of the Official College of Biologists.

Among the professional fields in which they can develop their activities are:

• Research and development, in research and development centers of companies, industries, and hospitals.
• Healthcare: clinical laboratories, human reproduction, public health, nutrition and dietetics, and animal and plant health.
• The pharmaceutical, agri-food, and chemical industries, performing tasks in technical, production, and quality management areas.
• The agricultural sector: optimization of plant, animal, and fungal crops and the search for new exploitable living resources.
• The environment: land use planning, conservation, and monitoring; management of forest, agricultural, and marine resources; environmental impact assessment; and restoration of the natural environment.
• Information and dissemination in museums, natural parks, the press, and the media in general.
• Teaching in secondary and higher education centers.