He develops his professional activity as an employed worker in the production area of large, medium and small companies, public or private, dedicated to open-air excavations, with or without use of the excavated materials. Performs activities of a technical nature, within the framework of the functions and objectives assigned by higher level technicians, from whom he will receive general instructions and to whom he will report. The professional activities of workers in open-pit or underground mining operations, with regard to general safety standards and those specific to their job, are subject to regulation by the competent Administration. The professional activities of mobile machine operators in open pit mining are subject to the regulations of the competent Administration. The professional activity of carrying out blasting with explosives is subject to the regulations of the competent Administration.