Professionalization of work represents the process of transforming an occupation into a profession with a high degree of integrity and competence, requiring the existence of professional qualification frameworks, standards, and nomenclatures to describe the necessary skills, abilities, and education for an individual to have a fruitful career. The current study provides details on professions from the engineering domain that are modeled using a prototype ontology tailored to the context of Industry 4.0 in the Romanian landscape. Our ontology represents the foundations for providing personalized recommendations to find suitable professions in the Romanian job market while illustrating the importance of AI tools to support career development.