You need a degree and a post graduate qualification, as recognized by the Society of Archivists. Your degree in history, IT, library studies, etc can give you the qualifications. The Society of Archivists recognize archivist qualifications. You can gain experience by volunteering. There is stiff competition to the available courses and for the job openings available for archivists. There will also be security/background checks. After you are employed as an Archivist, you can opt to join the Society of Archivists Registration Scheme. It takes up to three years to receive registered status.

You can opt for short term courses while you are on the job. There are seminars and workshops, which you can attend to keep your skills up to date, throughout your career.