Faria joined City University of London as a Research Fellow in 2005 and was made an EPSRC Advanced Lecturer in 2006. She contributed to the 2007 book Progress in Ultrafast Intense Laser Science II. In 2007 she moved to University College London. She is a member of the Atomic, Molecular, Optical and Positron Physics group. Her research considers laser fields that have stronger intensities than 10 Wcm. At these intensities, there is laser-induced scattering of electrons with their parent ions. Faria studies the temporal and spatial interference of these. She uses strong-laser physics in solid-state electronic devices, in plasma physics and as X-ray sources. She was made a Professor of Physics in October 2018.