Susan is broadly interested in astrophysical magnetism and the physics of the interstellar medium (ISM), from diffuse gas to dense, star-forming regions. Susan’s research tackles open questions like the structure of the Milky Way’s magnetic field, the nature of interstellar turbulence and the multi-phase ISM, and the role of magnetism in star formation. These big questions demand multiwavelength observations and new data analysis techniques. Susan and her group decipher the magnetic ISM using a combination of theory and observation. Data-wise, the group uses a wide range of tracers including gas line emission and absorption, polarized dust and synchrotron emission, starlight polarization, Zeeman splitting, and Faraday rotation. Susan is involved in a number of current and future telescope projects, and leads several efforts to maximize the science return from sensitive measurements of Galactic millimeter-wavelength emission made by cosmic microwave background experiments like the Atacama Cosmology Telescope (ACT) and the Simons Observatory (SO).