She has received national attention in the United States for her representation of Lieutenant Colonel Oliver North during the Iran–Contra hearings, and of President Bill Clinton during his impeachment trial.
Early life and education
She earned a B.A., magna cum laude, from Harvard College (Radcliffe) in 1978, and, in 1983, a J.D., magna cum laude, from Harvard Law School, where she edited the Harvard Law Review. In between college and law school (1978–1980), she worked as associate editorial page editor for Hong Kong's Asian Wall Street Journal (1978–1980). After law school, she clerked for Judge Harry T. Edwards at the U.S. Court of Appeals for the District of Columbia (1983-1984) and Justice Thurgood Marshall on the Supreme Court of the United States (1984–1985).
Seligman began her career in the private sector as a partner at Williams & Connolly in Washington, D.C. Only shortly after joining the firm, she was assigned to assist partner Brendan Sullivan in representing Lt. Col. North before Congressional hearing and at his trial. Eleven years later, her more senior partner, David Kendall, President Clinton's outside counsel, asked for her assistance. She appeared with Clinton when he testified before the grand jury in the Monica Lewinsky scandal, and she spoke on his behalf before the Senate at the impeachment trial. Her other clients at Williams & Connolly included large media organizations such as CNN (in the Operation Tailwind matter), ABC, and occasionally the National Enquirer (which was primarily represented by Kendall).
In September 2001, she was recruited by Howard Stringer, CEO of Sony Corporation of America, to become an Executive Vice President and General Counsel. In June 2003, she became Corporate Executive Officer of the worldwide Sony Corporation. When Stringer became Sony Corporation CEO in June 2005, Seligman rose to become General Counsel of that corporation, retaining the same role at SCA. She became President of Sony Corporation of America on June 27, 2012.
In August 2013, the Council on CyberSecurity announced that Seligman is a member of the organization’s Advisory Board. 
On February 18, 2016, it was announced, that Seligman is stepping down from the positions of President of Sony Entertainment and Sony Corporation of America; In an internal memo to employees, it was stated, that she'd leave at the end of March.
- Rainey, James (2016-02-18). "Nicole Seligman Stepping Down as President of Sony Entertainment". Variety. Retrieved 2016-02-21.
- Official Sony biography of Nicole Seligman. Accessed November 26, 2006.
- Franken, Bob. "Second female attorney argues for Clinton before Senate." Accessed November 26, 2006.
- Marcus, Ruth. "Clinton's Least Known Lawyer." November 18, 1999. Accessed November 26, 2006.
- Joan E. Solsman (29 March 2012). "Sony Names U.S. Entertainment Chief". Wall Street Journal.
- New York Times: "In a Most Private Kennedy, a Lure of Public Duty" By DEBORAH SONTAG January 18, 2009