Modern organizations are complex and often require the use of teams to accomplish tasks. But to accomplish such tasks requires the effective assembly of human capital. As such, scholars and practitioners focus on how to best compile members’ knowledge, skills, abilities, and other characteristics (KSAOs) – that is, team composition – in a way that best meets task demands. Research in this space has been fruitful and produced many important insights about how to best compose a team. However, this research has also become over reliant on operationalizations of constructs that mute the fine-grained details inherent to their theories of emergence. That is, many rely on simple means of aggregation (e.g., a within-team average of a certain KSAO). This practice has led to multiple calls for alternative conceptualizations of team composition variables. To that end, our symposium proposed various ways to conceptualize composition issues that, together, advance our understanding of compositional arrangements and their effects on important organizational outcomes. The Effects of Endogenous versus Random Network Positions on Group Performance Presenter: Jerry M. Guo; Aarhus BSS, Aarhus U. Presenter: Linda Argote; Carnegie Mellon U. Presenter: Jonathan Kush; U. of Massachusetts, Dartmouth Presenter: Erin Fahrenkopf; Carnegie Mellon U. Presenter: Jisoo Park; Carnegie Mellon U. - Tepper School of Business Investigating the Role of Personality Compatibility in Determining Transactivity Presenter: Ki-Won Haan; Carnegie Mellon U. - Tepper School of Business Presenter: Anita Williams Woolley; Carnegie Mellon U. Team Performance Improves with Star Role Sharing, but Do Stars Isolate or Collaborate? Presenter: Nathan Black; U. of Iowa Presenter: Greg L. Stewart; U. of Iowa Presenter: Stephen Reid; Brigham Young U. Recognizing and Utilizing Expertise in Teams: The Role of Specialist and Generalist Team Composition Presenter: Adam Arthur Roebuck; U. of Connecticut Presenter: John Mathieu; U. of Connecticut Presenter: Semin Park; U. of Iowa