 She later served as counsel to Commodity Futures Trading Commission in Washington, D.C., as counsel to the former Westinghouse Electric Corporation, and as a consultant to Justices of the Pennsylvania Supreme Court.She was a professor at Duquesne University School of Law, and is currently the Dean of the Law School

In 1998, Lally-Green was appointed by Governor Tom Ridge to the Superior Court of Pennsylvania and confirmed by the State Senate.The next year, Judge Lally-Green was elected for a full ten-year term.