Cominsky joined the faculty at
Sonoma State University (SSU) in 1986, where she is a professor of physics and astronomy. She served as chair of the Department of Physics and Astronomy from 2004 to 2019 and also chaired the Department of Chemistry on two occasions, first from August 2005 to January 2007 and later during a subsequent interim term. In 1992, Cominsky began a collaboration with scientists at the
Stanford Linear Accelerator Center (SLAC), including Elliott Bloom. This collaboration led to her long-term involvement with NASA's
Fermi Gamma-ray Space Telescope (formerly the Gamma-ray Large Area Space Telescope, GLAST), for which she played a major role in education and public engagement activities. In 1999, Cominsky founded EdEon STEM Learning at
Sonoma State University, originally established as the Education and Public Outreach (E/PO) Group and renamed in 2018. She serves as director emerita of EdEon and has been principal investigator or co-principal investigator on approximately $43 million in competitive federal and state grants, with an additional $2 million awarded to EdEon projects on which she did not serve in either role. Through EdEon, she has overseen the development and national dissemination of STEM curricula, digital resources, and teacher professional development programs serving students and educators in grades 5–14, as well as the general public. As part of these efforts, Cominsky has contributed to education initiatives for multiple NASA missions, including Fermi, NuSTAR, and LIGO, and served as final technical reviewer for mission-related educational products. EdEon's largest NASA-funded project was the Education and Public Outreach program for the
Fermi Gamma-ray Space Telescope mission. Launched on June 11, 2008, Fermi (formerly known as GLAST) is a space mission that uses silicon strip detectors to observe cosmic gamma-radiation from objects such as pulsars and quasars in the energy range 10 MeV - 300 GeV. Cominsky's group also led the Education and Public Outreach team for the
Swift Gamma-Ray Burst Mission, launched on November 20, 2004. In 2003, Cominsky assumed the lead for the outreach effort for the US portion of the
European Space Agency's
XMM-Newton satellite. From 1999 to 2005, Cominsky was also the principal investigator and faculty advisor for the North Bay Science Project, a California Science Project site located at SSU. Other major projects developed by the SSU E/PO group include an online Cosmology curriculum for undergraduates, and an innovative curriculum for secondary students to build small payloads for launch on high-powered rockets and balloons. Cominsky is also a scientific co-investigator on the
Fermi, Swift
NuSTAR missions, and a member of the
LIGO Scientific Collaboration. From 2012 to 2014, the SSU E/PO group developed an educator's guide for the NuSTAR mission. Beginning in 2013, Cominsky, through what is now EdEon STEM Learning at
Sonoma State University, initiated the development of Learning by Making (LbyM), an integrated, student-driven STEM curriculum for rural high school students, in partnership with SSU's Early Academic Outreach program.
Learning by Making was the first in a sequence of three consecutive five-year projects funded by the U.S. Department of Education, aimed at improving STEM and computer science education outcomes for high-needs rural students in Northern California. The most recent phase of this work, known as STEMACES, represents the current incarnation of the program and continues to build on the curriculum, teacher support, and student engagement models established by LbyM. As part of these initiatives, EdEon has provided extensive teacher professional development, offering approximately 80 hours of training annually since 2013 for educators implementing the Learning by Making curriculum. This training includes multi-day academic-year workshops and an intensive 40-hour summer institute hosted at Sonoma State University. Cominsky has also served as Principal Investigator on the
National Science Foundation–funded project “Teaching Einstein’s Universe at Community Colleges,” which developed an online professional learning course for lower-division physics instructors. The project focuses on strengthening instruction related to gravitational waves and the science of LIGO, while providing classroom-ready resources for calculus-based introductory physics courses. Cominsky has been a member of many different advisory committees, including the Chandra User's Group, the Structure and Evolution of the Universe Subcommittee of NASA's Space Sciences Advisory Committee, and the LIGO Program Advisory Committee. She has served on the executive committees for the High Energy Astrophysics Division of the
American Astronomical Society, and for the Division of Astrophysics of the
American Physical Society. For a decade, she was the deputy press officer for the
American Astronomical Society, and she continues as the press officer for both the Fermi and Swift missions. In these positions, she often interprets astronomical discoveries to the public. ==Honors and awards==