Background
O'Brien, Dennis Sean was born on June 19, 1953. Son of Edward Patrick and Virginia O'B.
O'Brien, Dennis Sean was born on June 19, 1953. Son of Edward Patrick and Virginia O'B.
Associate of Arts, Springfield College, Illinois, 1973. Bachelor, Rosary College, 1975. Juris Doctor, Loyola University, Chicago, 1978.
Assistant states attorney felony division Lake County States Attorney' General’ s Office, Waukegan, Illinois, 1978-1980. Partner Livingstone, Mueller, O'Brien & Davlin, Springfield, since 1980, vice president, secretary, since 1999. Presenter seminar Illinois State Bar Association, Illinois Institute for Continuing Legal Education, National Business Institute, Lohrman Education Services.
Member, board managers Springfield Municipal Opera, since 1972, president, 1990—1992, board directors, 1971—1975, 1988—1992, 1994—1997, 1999—2006, president, 1990—1992. Board directors Springfield Theatre Center, 1986—1988, Sangamon Valley Youth Symphony, since 2005. Member Leading Lawyers Network, since 2003.
Member of American Bar Association, Illinois Bar Association (workers compensation section council 1988-1990, since 2005), Sangamon County Bar Association (board directors 1995-1997).
Married Laurie Lynne Barnes, August 6, 1977. Children: Sean Patrick, Kathleen Erin, Elizabeth Honora, Conor James.