I studied my bacherlors and masters in the USC. Since 2022, I have been doing my PhD in multimessenger astronomy, working on ultra-high-energy neutrinos with the Surface Detector of the Pierre Auger Observatory. The observatory is currently transitioning from Phase I to Phase II, during which new electronics are being installed across the array of stations. one of my primary tasks to retrain the neutrino-selection algorithms for Phase II. At the same time, I am using Phase I data to place constraints on the ultra-high-energy neutrino flux from different source classes, such as gamma-ray bursts, or binary-black-hole mergers reported by the LIGO–Virgo–KAGRA Collaboration.