The responsibility of the engineer varies from project to project and from site to site. The duties of site engineer are also dependent on the scale of the project like you cannot compare the duties of a site engineer employed on small scale project to that of a large-scale project. in the field has to deal with planners, architects, sub-contractors, engineers. This dealing again is project dependent and project scale dependent sometimes an engineer has to deal with all of the mentioned and sometimes there will be few of them. Based on this dealing responsibility of site engineer includes the security, health and safety of the workers doing work in the field. Organizing and supervising is in the hit list of his duties. needs to make decisions with in the limited time which have impacts to that structure for its whole life like he has to mark out the site that is suitable for the project in the given locality. He should then ensure that the designs that are given are suitable and he should analyze the day to day working to ensure they are correctly applied.