He currently has a post-retirement position at Rutgers and at the Chemistry and Chemical Biology Department of Princeton University.
He continued at the university until 1981, when he took a position as Senior Scientist at Exxon Research and Engineering Company in New Jersey.
Cohen’s primary research field is theoretical condensed matter physics, with a focus on superconductivity.
In 1962, Cohen, Falicov, and Phillips calculated the tunneling current between normal and superconducting metals across a barrier.
Cohen also contributed to the history of physics, writing memoirs of his interactions with Elihu Abrahams,[7] Enrico Fermi,[8] and David Turnbull,[9] coauthoring with Marvin L. Cohen an obituary[10] for Charles Kittel, and giving an oral history interview[11] to the American Institute of Physics in 1981.