Lozier was a post-doctoral fellow at the
Woods Hole Oceanographic Institution before joining the faculty at Duke University. She is a principal investigator for the
Overturning in the Subpolar North Atlantic Program (OSNAP), responsible for coordinating its international and national projects. Lozier was the first woman to graduate from the University of Washington's physical oceanography doctoral program, and is active in the community mentoring program, MPOWIR (Mentoring Physical Oceanography Women to Increase Retention). In 2020 she was elected to the
American Academy of Arts and Sciences. Lozier was the featured speaker for the 16th Annual Roger Revelle Annual Commemorative Lecture, sponsored by the National Academies and held at the National Museum of Natural History in Washington, D.C., on March 4, 2015, presenting her lecture on ''Overturning Assumptions: Past, Present, and Future Concerns about the Ocean's Circulation''. Lozier started a two-year term as president of the
American Geophysical Union in 2021. ==Select publications==