There are many types of employment available in the field of health and medicine, but some of the most interesting jobs are those that fall under the type of job where medical working capital is necessary. Employment for jobs such as medical professionals who require large investments in personal equipment like dentists or plastic surgeons is financially rewarding, but can be difficult in early years due to the large investments required of those who wish to open their own office. Even doctors who take part in a cooperative practice may be required to invest heavily in medical devices which require significant financing to purchase.