For many decades, employee representation and voice in the employment relationship were manifested mainly through unionism and collective bargaining, but that is no longer the case. Today most employees do not belong to unions, but they may be represented and exercise voice through a variety of other mechanisms and arrangements. This paper provides an overview of a special issue of Industrial Relations containing eight papers that analyze various types of non-union employee representation. These papers feature a wide variety of research designs as well as industry, company, and employee settings. Empirically, they draw upon data from the United States, the UK, Canada, and Australia. As a set, these papers provide the most comprehensive knowledge to date of employee representation in non-union firms, and also offer recommendations for future research to further enhance such knowledge.