Social media technologies (SMTs), online brand communities, and social customer relationship management (SCRM) Capabilities play an indispensable role in the engagement and loyalty-building of university students to achieve a sustainable university reputation. This study provides pioneering input for higher education institutions (HEIs) by developing a new integrated SCRM model through self-congruity or self-congruence theory, which examines SMTs Use, online brand communities, SCRM Capabilities, customer engagement, customer loyalty, and university reputation. Using cross-sectional data from 400 students from Pakistani public universities, structure equation modeling applies to Smart PLS 3.2.7. Results indicate that all hypotheses have significant positive relationships, except SMTs use found insignificant with university reputation. Also, SCRM Capabilities mediate between SMTs use and university reputation, while customer engagement mediates between online brand communities and customer loyalty. This study indirectly supports public HEIs sustainability. Further, these findings contribute new knowledge to literature and theory.