What is an independent contractor audio mastering engineer?

An Independent Contractor Audio Mastering Engineer is a professional who works on a freelance basis to finalize and enhance audio recordings for clients, such as musicians, producers, or record labels. Their main responsibility is to prepare the final mix for distribution by adjusting levels, equalization, compression, and other sonic elements to ensure the best possible sound quality across all playback systems. As independent contractors, they are self-employed and manage their own schedules, clients, and business operations, rather than being directly employed by a studio or company.