Aging is a complex and multi-dimensional process that affects all tissues of all organisms. Accumulating evidence suggests that disruption of immune homeostasis and responses with age plays a significant role in the aetiology and pathogenesis of many aging-associated diseases. Recent advances in genomic technologies (e.g., single cell, spatial approaches), combined with advances in molecular techniques (CRISPR-Cas9), enable precise descriptions of molecular and cellular changes associated with immune system aging in human cells as well as in model organisms. With these advances, we are in need of interdisciplinary settings to promote interactions to foster collaborative research and career advancement across disciplines.