The Diploma Thesis "Ethical aspects of work as a long-term human commitment" deals with the question under what condition the work assigned as the external obligation can be understood as the personal responsibility. The Thesis deals with the dilemma between commitment and responsibility, the purpose of work as a commitment from the Christian and philosophical point of view. It describes and analyzes the variety of meaning and forms by which a person's work can be personaly commited, further defines the criteria for such binding, including Christian and philosophical bases. The Thesis connects the general socio- ethical argumentation with the reflection of the author's practical experience from the metallurgical industry in the Ostrava region. On concrete examples, it shows the current ethical issues associated with understanding the assigned work as a personally responsible commitment and proposes solutions to them in accordance with Christian principles. Keywords ethics, work, long-term commitment, responsibility, business ethics, Christian ethics