Unlocking longevity through in-situ Hematopoietic Stem Cell Rejuvenation using combined modulation of aging-disrupted pathways identified by publicly available and proprietary single-cell datasets from young and old human populations. Stem-cell exhaustion is a key hallmark of aging, contributing to impaired tissue repair, immune dysfunction, and systemic frailty. In this project, we took a novel approach to this challenge—rather than replacing aged blood-forming stem cells (HSCs) through transplantation, the project seeks to rejuvenate the body’s own stem cells in situ. We have analysed nearly 850,000 single-cell transcriptomes from healthy donors aged 23 to 91 from publically available and proprietary datasets, generating a high-resolution atlas of hematopoietic aging. The data reveal consistent age-related molecular signatures: younger HSCs show elevated expression of DNA repair and mitochondrial genes, while older cells exhibit ferroptosis drivers, inflammatory signaling (notably TNF and IL-17), and upregulation of CCR9 and long non-coding RNAs. These findings were confirmed in both circulating and bone marrow-derived HSCs, reinforcing their potential as biomarkers and intervention targets. In conclusion, we have identified a list of target genes, which can be used as a intervention for hematopoietic stem cell rejuvenation studies. The key insight is that we are targeting multiple aging mechanisms simultaneously - transcriptional stress responses, epigenetic regulation, and protein homeostasis. Classic damage repair thinking applied to the molecular level. This multi-pronged approach could achieve the robust rejuvenation that single interventions miss.