That depends on the individual. Normally, an employee is hired out for a period of between three and 18 months. This may be agreed upon on a case-by-case basis, or it may be determined by the achievement of certain project goals or progress in change management. The contract is deliberately kept flexible and tailored services are only provided for the development and enhancement of performance. It is also feasible that the interim marketing manager will only help out until a new, permanent employee has started their career in the company.