Dr. Rehner holds a Distinguished Professorship and is the director of the School of Social Work and director of Caribbean Studies at The University of Southern Mississippi. He also serves as co-founder and director of the Family Network Partnership, a university-affiliated, community-based delinquency prevention agency and counseling center in Hattiesburg, Mississippi. He has taught undergraduate, graduate and professional students at all levels, with a focus on diversity, social justice and social welfare. His extensive scholarship includes studies on community resilience in coastal Mississippi, and his work is widely published in peer-reviewed journals and technical reports. His service to the university includes several significant faculty governance leadership positions in the Faculty Senate, Council of Directors, Council of Chairs and the Academic Leadership Council. In addition, his service to the profession includes service on the National Association of Social Work MS Board and editorial board and review of The Social Work Journal of Education.
His many honors also include his leadership as an invited co-director to establish a panel of national experts to envision a sustainable Gulf Coast through the integration of natural and human sciences. In addition, he was an invited panelist for the National Academy of Sciences, Engineering, and Medicine to discuss the integration of natural, health and social sciences to support the development and health of the Gulf of Mexico.