Dr. Simpson received her Doctor of Science in Astronomy degree at the University of Florida in 1995. She joined FIU's Department of Physics also in 1995, where she is now a full professor. She teaches courses in introductory astronomy for non-science majors as well as undergraduate astrophysics for students pursuing a minor in Astronomy.
Simpson's research is on star formation in dwarf galaxies, with an emphasis on the atomic hydrogen gas which is the initial building block for stars. As star formation is how galaxies evolve, and because dwarf galaxies are the most abundant type of galaxy in the universe, studying star formation in dwarf galaxies helps us understand how the universe has evolved over time.