this type of employee is someone who does work for an organization on a temporary or part-time basis
Temporary work Temporary work or temporary employment refers to an employment situation where the working arrangement is limited to a certain period of time based on the needs of the employing organization. Temporary employees are sometimes called "contractual", "seasonal", "interim", "casual staff", "outsourcing", "freelance"; or the word may be shortened to "temps". In some instances, temporary, highly skilled professionals (particularly in the white-collar worker fields, such as law, engineering, and accounting) refer to themselves as consultants.
Works Progress Administration The Works Progress Administration (WPA; renamed in 1939 as the Work Projects Administration) was the largest and most ambitious American New Deal agency, employing millions of people (mostly unskilled men) to carry out public works projects,[1] including the construction of public buildings and roads. In a much smaller project, Federal Project Number One, the WPA employed musicians, artists, writers, actors and directors in large arts, drama, media, and literacy projects.[1]