Purpose: To examine socialization experiences of physical educators who deliver strength and conditioning (S&C) programming, particularly the development of subjective theories, expertise, orientations, and perceived mattering. Methods: Thirty-one secondary school physical educators providing S&C instruction/supervision as part of required duties completed in-depth interviews with Occupational Socialization Theory as a guiding framework for analysis. Results: Themes developed were: (a) acculturation and organizational socialization influence beliefs, (b) S&C professional development is scarce, (c) S&C in physical education is a sporting endeavor, (d) blurred lines between teaching and coaching, and (e) S&C-related programs matter. Discussion: Physical educators delivering S&C programming lack adequate preservice preparation and professional development, and experience both role conflict and decreased marginalization. Physical education teacher education programs should offer more formal S&C training for safe and effective instruction/supervision. Schools should provide S&C-related professional development to maximize student learning and safety and avoid potential legal liability.