Contractors are professionals who specialize in the construction industry. They are responsible for managing and overseeing construction projects from start to finish. Contractors work with clients to determine project requirements, create project plans, and ensure that all work is completed on time and within budget. They are also responsible for hiring and managing subcontractors, obtaining necessary permits and licenses, and ensuring that all work is done in compliance with local building codes and regulations. Contractors may work on a variety of projects, including residential, commercial, and industrial construction.