Proposal writers compose documents to gain support for a project, enter into a business agreement, or convince clients to buy products and services. To complete the proposal, they usually work with a team to research a specific issue, conduct interviews, collect information, and organize the data before submitting the application or sending the contract to a client. Proposal writers may work for non-profit organizations or private companies, or they may be freelancers who work for many different businesses. Some proposal writers specialize in a specific industry, such as grant writing for non-profit organizations.