This qualitative study explored essential characteristics attributed to highly effective School Resource Officers (SROs) as perceived by experienced Indiana high school principals. Through semi-structured interviews with five high school principals from Indiana, the study sought to identify key responsibilities, outcomes, proactive activities, and other characteristics high school principals perceive as distinguishing characteristics of high-performing and highly effective SROs. In this comprehensive study, the findings are robust and eye-opening. They underscore the indispensable role of SROs in fostering genuine connections within the school community. Through proactive engagement, highly effective SROs establish meaningful relationships with students and staff, reinforcing a sense of trust and security. Moreover, their adept understanding of school dynamics, coupled with effective communication skills, enables them to navigate complex situations with finesse. Most notably, these officers demonstrate a keen ability to address safety concerns head-on, employing strategic problem-solving tactics to uphold a secure learning environment. Data suggests that highly effective SROs are indispensable partners in promoting school safety, fostering positive relationships, and cultivating proactive approaches to addressing safety concerns. Beyond their law enforcement duties, SROs serve as valuable partners in building positive school climates. The study's findings are intended to give significant insights into the field of educational leadership, including recommendations on the recruitment, training, and assignment of SROs to improve their efficacy in promoting safe and supportive learning environments in Indiana high schools. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]