Dean Mostafá has significantly contributed to high-energy and multimessenger astrophysics. His cutting-edge research spans a wide range of areas, from gamma-ray observations using the High Altitude Water Cherenkov (HAWC) Gamma-ray Observatory to groundbreaking work on cosmic-ray anisotropies and particle interactions through the Astrophysical Multimessenger Observatory Network project, which he leads at Penn State. His research has garnered widespread recognition, with 11 renowned papers with over 500 citations each and more than 2,000 citations annually since 2017.