Snyder has contractors of various kinds available for hire. These may be independent professionals, or they may be part of an agency. A contractor is a professional, responsible for the day-to-day functioning and progress of a project. This is usually for building construction, but contractors can be for many different projects, such as drilling for gas, interior decoration services, plumbers, maintenace services, and so on. The contractor is in charge of the day-to-day supervision of the project. He provides all of the material, labor, equipment (such as engineering vehicles and tools) and services necessary for the project. This he could do himself, or employ subcobtractors for specialized areas. A contractor may need to be certified. This varies from state to state. Educational backgrounds can be varied, such as construction science, building science, surveying, construction safety, environment studies, etc. You ought to choose a contractor who can stay within budget and deadlines, is prompt and efficient, and has a fair amount of experience in similar projects in the past.