Consultant
A consultant (from the Latin consultare meaning "to discuss" also the basis of words such as consul and counsel) is a professional who provides expert advice in a particular area of expertise. Various consultants offer advice in management, accountancy, the environment, entertainment, technology, law (tax law, in particular), human resources, marketing, emergency management, food production, medicine, finance, statistics, software, life management, economics, public affairs, communication, engineering, sound system design, graphic design, or waste management.