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A consultant is usually an expert or a professional in a specific field and has a wide area of knowledge in a specific subject. Consultants can save their clients time, increase revenue, and maintain resources. [2] The role of a consultant outside the medical sphere (where the term is used specifically for a grade of doctor) can fall under one of two general categories:

  • Internal consultant – someone who operates within an organization but is available to be consulted on areas of specialism by other departments or individuals (acting as clients); or
  • External consultant – someone who is employed externally (either by a firm or some other agency) whose expertise is provided on a temporary basis, usually for a fee. As such this type of consultant generally engages with multiple and changing clients.

The overall impact of a consultant is that clients have access to deeper levels of expertise than would be feasible for them to retain in-house, and may purchase only as much service from the outside consultant as desired.


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