My research to tries to answer one of the Big Questions in science: what is the universe made of? My research focuses on neutrinos, the most abundant known massive particle in the universe, and the search for dark matter, the unknown stuff that makes up more than 80% of the matter in the universe! I have a long history of working on dark matter experiments, having been part of CMDS-II, XENON10, ZEPLIN-III, and the Large Underground Xenon (LUX); and I am currently working on the LUX-ZEPLIN (LZ) experiment, a next-generation dark-matter detector that will be the most sensitive search over the next decade. More recently, I have been working on the Project 8 Neutrino Mass experiment. Although the neutrino was discovered almost 60 years ago, it’s one of nature’s most elusive particles, and we still don’t know one of its most fundamental properties, its mass. The Project 8 experiment seeks to determine the neutrino mass by precisely measuring the energy spectrum of Tritium beta decay, using a technique that allows the measurement of individual electrons in a magnetic trap, called Cyclotron Radiation Emission Spectroscopy (CRES). I am originally from São Luís in Brasil, but I did both my undergraduate and graduate studies in the US. I have a Bachelors Degree from Clark University in Massachusetts, where I majored in Physics and Philosophy, and worked in the Organic Superconductors Lab. I got my PhD in Physics at Brown University, where I was part of the Particle Astrophysics Group, and my advisor was Prof. Richard Gaitskell. During my graduate studies, I worked on the XENON, LUZ and LZ experiments. XENON10 was located at the Gran Sasso Underground Labs, about 1 hour northeast of Rome, so I got to spend a year living in Italy. I also spent 4 years living in Portugal, where I did a Postdoc at Laboratório de Instrumentação e Física Experimental de Partícula (LIP) in Coimbra; and 3 years in Santa Barbara, California (USA), where I did another postdoc at the University of California, Santa Barbara (undoubtedly the most beautifully located campus ever!).