The person will collect and prepare - using sterile laboratory techniques - bronchoscopy with BAL fluid, bronchoscopically-brushed endobronchial cells, and blood (whole blood, serum, plasma, and peripheral blood mononuclear cells (PBMCs), and bodily fluids (semen abd saliva) for molecular- and cell-based laboratory assays; inventory and store these specimens; arrange proper specimen transport (e.g., on dry ice) to collaborating investigators and staff; oversee the incoming data interpretation from samples and ensure that it is utilized correctly for analysis and publications; organize, manage and update specimen transfer inventories; and ensure the integrity and security of samples. More specifically, the main responsibility of the person in this role is to screen, enroll, and conduct study visits with patients; and to collect, process, store, and ship respiratory (i.e., bronchoscopy with bronchoalveolar lavage, BAL), blood, and other bodiy fluid specimens from HIV-infected and HIV-uninfected subjects in San Francisco that will be used for a wide-range of molecular- and cell-based laboratory assays, including 16S rRNA microarrays and Illumina DNA and RNA sequencing, telomere length and telomerase activity assays, polymerase chain reaction (PCR) and enzyme-linked immunosorbent assay (ELISA) assays, and unbiased next generation sequencing (NGS) assays.