Michael John Rinder is an Australian-American former senior executive of the Church of Scientology International (CSI) and the Sea Organization based in the United States. From 1982 to 2007, Rinder served on the board of directors of CSI and also held the post of executive director of its Office of Special Affairs, overseeing the corporate, legal and public relations matters of Scientology at the international level.

The Church of Scientology International (CSI) is a California 501(c)(3) non-profit corporation. Within the worldwide network of Scientology corporations and entities, CSI is officially referred to as the "mother church" of the Church of Scientology.