Staffing agencies often have a level of expertise that far exceeds some employers’ human resources departments. Hiring recruiters, employment specialists and an employment or recruiting manager to supervise staff could require a lengthy recruiting period to find qualified employees. Staffing agencies provide services that rival the best qualified recruiters and employment specialists, usually at a lower cost. 

Employees of staffing agencies generally have a higher level of expertise related to job knowledge, employment trends and recruitment practices by virtue of continuous placement of employees. They also have industry expertise if they work for staffing agencies that specialize in certain fields, such as healthcare providers.