Cassidy & Associates pioneered the use of congressional earmarks, used to obtain grants for university clients; Cassidy himself sat on the board of Villanova University and Boston University. Cassidy was also an aide to Sen. George McGovern and general counsel of the Democratic National Committee's Party Reform Commission.
In March 2000, Cassidy was named #52 on the Forbes "The Power 100." In early 2007, he became the subject of an extensive Washington Post series, addressing details of his personal life and professional success.
In 2013, Cassidy stepped down from the day-to-day leadership of Cassidy & Associates and became chairman emeritus.
- "Gerald S.J. Cassidy: Executive Profile & Biography". Bloomberg Businessweek. Retrieved 19 January 2015.
- "Gerald Cassidy, Chairman/CEO/Founder, Cassidy & Associates Inc". bloomberg.com. Bloomberg Businessweek. Retrieved 19 January 2015.
- "Lobbying legend Gerald Cassidy stepping down from his firm". Washington Post. Retrieved 2016-05-16.