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SMA Member Login Stage Managers Association Stage Managers Association Stage Managers Association The only national business service association for stage managers that exists solely to advocate for provide continuing education to recognize mentor and create a greater stage management community in the United States. What People Say About Us Why join the SMA. Champion Support Promote Advocacy The founding of the SMA was built upon the need to advocate for the stage management voice in the union. Since then the SMA continues to be the voice of the profession to advocate for equitable treatment of stage managers as they pursue a career in the profession.