<p>Peer support specialists (PSS) are essential in behavioral health and substance use crisis services by providing support, hope, and encouragement to those in crisis. Despite their benefits, there is a lack of consensus on the core competencies required for PSS working in crisis settings. This study identifies key competencies to inform the development of a Crisis Peer Support Specialist Training curriculum. An e-Delphi survey method was used to collect opinions from subject matter experts (SMEs) working Early Intervention Support Services (EISS) programs. The three-round process gathered qualitative and quantitative input on the required competencies of PSS in crisis settings. Responses from SME were analyzed using thematic coding and a Likert-scale ranking system to determine perceived importance. Four key areas were identified as essential competencies: knowledge, skills, attitudes, and unique contributions. The highest-ranked competencies emphasized ethics and maintaining professional boundaries, demonstrating empathy, and providing a welcoming presence. Consensus from the SME was reached on the core competencies necessary for PSS in crisis settings. Findings highlight the key competencies a PSS requires for delivering services in crisis settings. The results informed the development of a specialized training program for PSS in these settings. Future research should continue to explore the required competencies across different crisis care settings.</p>