Before an article or book is submitted for publication, it is very important that it be checked by a third party who proofreads the work. This third party can look for overlooked errors, make sure the wording is clear and understandable, and help polish the article to ready it for publication.
While some companies may require a college degree, most do not. There are many places that require a proofreader. Besides newspapers and magazines and other publication companies, a company may require a proofreader for their trade publication or advertisement, lawyers for their legal documents, and doctors for their medical journals. Anything that is printed, either on paper or online, can be proofread.
In addition to full time jobs, freelancing proofreading jobs are available. Individuals may also seek proofreading services. Students need help with important term papers, job seekers need help with a resume, and authors may want assistance with their novel. In these cases, the pay is usually by the piece and variable. You will need to market your skills to keep a jobs coming and the income steady. When working with individuals, you will need to take extra care to present your corrections gently, since they may be sensitive to criticism.
Strong command of the language, particularly vocabulary, grammar and spelling
Knowledge of proofreading marks
Attention to detail
Tact and diplomacy