This study explores the evolving role of systems librarians in Nigerian university libraries amid a period of rapid digital transformation. As academic libraries shift from traditional knowledge repositories to dynamic, technology-driven learning environments, systems librarians have emerged as key drivers of innovation, extending their responsibilities beyond technical maintenance to include the management of integrated digital systems, cybersecurity, user-centred service design, and institutional collaboration. Using a secondary research methodology based on a comprehensive review of scholarly literature, professional reports, and case studies, the study examines how these professionals adapt to technological advancements, such as open-source platforms and artificial intelligence, while navigating persistent challenges, including underfunding, inadequate infrastructure, and ambiguous institutional expectations. The findings indicates that although systems librarians have embraced their expanded roles, their impact is often limited by a lack of strategic support. The study highlights the crucial importance of institutional investment in infrastructure, ongoing professional development, clearly defined responsibilities, and the involvement of systems librarians in library leadership and planning processes. Strengthening these areas is essential for enabling systems librarians to lead and sustain digital innovation in Nigerian academic libraries effectively.