The Master's thesis examines the role of an engineer or a building surveyor in the Construction Supervision Contract, which also defines his duties and responsibilities that are entrusted to him. Construction as a complex process of building various facilities requires a professional and technically personified person, who monitors the entire construction work, so that is carried out in accordance with the project documentation, the construction legislation and other relevant regulations. When selecting an engineer, the employer must take into account that the selected person has sufficient knowledge and experience in the construction of objects, so that he can be "qualified for the tasks" that are entrusted to him. We have several different regulations within Slovenian legal order that regulate the role and responsibility of the engineer. Due to the asymmetry of information the employer and the engineer may encounter a number of problems and dangers within their relationship. It is also important to distinguish between our legal system, which belongs to the Continental legal system and the Anglo-Saxon legal system, which defines the engineer as an independent expert, who in addition to the technical supervision also performs many other activities, including counseling to the employer throughout the construction and coordination of other participants in the construction. The Master's thesis notes that the role of the engineer is extremely important in the construction process. His role is not explicitly regulated in the Obligatory Code, which contributes to the fact that the rights and obligations of the engineer, which are defined in the Building Act as a public law regulation, affect the legal issues and the obligations of the engineer in relation to the employer.