A long-term worker contract is an employment arrangement that generally lasts for six weeks, several months or years. As you become an important part of the organization, you are also given more responsibilities. For a fixed period of time, some positions require you to be willing to stay and develop with the industry. For those who are looking for benefits such as health insurance and a stable income, these forms of employment are advantageous. As you develop your abilities and experience, your job duties also increase in complexity over time.