She was Chair of the Department of Government at Florida State University, and was the Charles O. Lerche Jr.
[2][3] In 1967, Irish moved to the School of International Service at American University, where she became the Charles O. Lerche Jr.
[5] With Elke Frank, Irish co-authored Introduction to Comparative Politics: Thirteen Nation States, which was re-published in a second edition in 1977.
[6] Irish and Frank also coauthored the 1975 book U.S. foreign policy: Context, conduct, content, which is an overview of American foreign policy after the end of World War II.
[8] Irish published a symposium series in the Journal of Politics which, on the 30th anniversary of that journal's publication, was reprinted as an essay collection, called Political Science: Advance of the Discipline.