Carlos Argüelles-Delgado is a neutrino physicist. Their work explores properties of neutrinos using data from the IceCube Neutrino Observatory. The surprising discovery of neutrino mass and mixing leads to the obvious question: what other unexpected properties might neutrinos have? IceCube data provides a unique window on the highest energy neutrinos ever observed. It is an ideal place to search for new Beyond Standard Model effects. The IceCube detector is buried in the Antarctic continent glacier, close to the geographic South Pole. IceCube observes neutrinos that are up to six orders of magnitude higher in energy than those produced at accelerators today. Most of these neutrinos are produced in the collision of cosmic-rays with the Earth atmosphere, while the rarest of them are neutrinos of cosmic-origin that come from some of the most extreme environments in the Universe. Argüelles develops new techniques to study these neutrinos and characterize them in order to search for new neutrino physics and understand the origin of the high-energy astrophysical neutrino flux. The IceCube experiment was upgraded this December: the addition of an array of more tightly packed detectors in the inner part of the current array. Argüelles-Delgado participates in the development of this new detector and enhancement of its physics reach capabilities.