After 21 years on the staff of The Washington Post, Gellman resigned in February 2010 to concentrate on book and magazine writing. He now holds positions as Senior Fellow at the Century Foundation, Contributing Editor At Large of Time magazine, and Lecturer and Author in Residence at Princeton University's Woodrow Wilson School of Public and International Affairs.
At Time, Gellman's work has included cover stories on extremist domestic militias, on FBI Director Robert Mueller. and on the early influences in the life of Republican Party Presidential Nominee, Mitt Romney. He also writes Time's CounterSpy blog on digital privacy and security.
In 2008, Gellman published the bestselling Angler: The Cheney Vice Presidency, which won the Los Angeles Times Book Prize and was named among the 100 Notable Books of 2008 by The New York Times. Gellman is now helping adapt the book for an HBO miniseries.
"Angler" grew out of a series of articles with partner Jo Becker on Dick Cheney in The Washington Post, which won the 2008 Pulitzer Prize, a George Polk Award, and the Goldsmith Prize for Investigative Reporting. Gellman also shared a Pulitzer for national reporting in 2002.
Gellman has previously been a finalist for the Pulitzer Prize for Explanatory Reporting, in 1999  and 2004. Other professional honors include two Overseas Press Club awards, the Sigma Delta Chi Award from the Society of Professional Journalists, the Gerald Ford Foundation Prize for reporting on national defense, the SAIS-Novartis International Journalism Award  and the Jesse Laventhol Award for deadline writing from the American Society of Newspaper Editors.
In previous postings, Gellman covered Washington DC courts, including the trial of former mayor Marion Barry; was Pentagon correspondent during the 1991 Persian Gulf War, the U.S. intervention in Somalia and the social upheavals relating to the status of gays in the military and the assignment of women to combat roles; became Jerusalem bureau chief in 1994, covering peace negotiations, the assassination of Yitzhak Rabin, and the ascent of Benjamin Netanyahu; returned to Washington as diplomatic correspondent, covering Secretary of State Madeleine Albright and the collapse of the United Nations Special Commission (UNSCOM) effort to disarm Iraq; and moved to New York in 1999 to take up the special projects role.
Gellman graduated summa cum laude from Woodrow Wilson School of Public and International Affairs at Princeton University and was a Rhodes Scholar, earning a master's degree in politics from University College, Oxford . He returned to Princeton for two semesters as Ferris Professor of Journalism in 2002 and 2009, teaching courses called "The Literature of Fact" and "Investigative Reporting.".
In addition to the Cheney book, Gellman is author of Contending with Kennan: Toward a Philosophy of American Power, a well-received 1985 study of the post-World War II "containment" doctrine and its architect, George F. Kennan.
Personal and family history 
The son of Stuart Gellman of Tucson, Arizona, and Marcia Jacobs of Philadelphia, Pennsylvania, he lives with partner Dafna Linzer  in New York City. A previous marriage to Tracy Ellen Sivitz  ended in divorce. He is the father of four children: Abigail, Michael, Lily and Benjamin Gellman.
- Contending with Kennan: Toward a Philosophy of American Power. New York: Praeger Publishers, 1985. ISBN 0-275-91737-1 (10). ISBN 978-0-275-91737-1 (13). [Hardcover ed.] New York: Greenwood Publishing Group, 1985. ISBN 0-275-91805-X (10). ISBN 978-0-275-91805-7 (13). [Paperback ed.]
- Angler: The Cheney Vice Presidency. New York: Penguin Press, 2008. ISBN 1-59420-186-2 (10). ISBN 978-1-59420-186-8 (13). [Hardcover ed.]
- Poynter Institute
- Princeton faculty listing
- The Secret World of Extreme Militias
- The Counterterrorist
- CounterSpy blog
- New York Times Hardcover Nonfiction Best Sellers, Oct. 5, 2008
- Los Angeles Times Book Prize
- New York Times Best Books of 2008
- New York Observer
- Pulitzer Prize Announcement
- 2007 Polk Award Announcement
- Goldsmith Prize Announcement
- Pulitzer Prize Announcement
- 1999 Pulitzer Prize Finalists
- 2004 Pulitzer Prize Finalists
- Overseas Press Club
- Overseas Press Club
- Society of Professional Journalists
- Gerald Ford Foundation
- SAIS-Novartis Intl Journalism Award
- American Society of Newspaper Editors
- Barton Gellman and Walter Pincus, "Iraq's Nuclear File: Inside the Prewar Debate Depiction of Threat Outgrew Supporting Evidence", Washington Post, August 10, 2003: A01, accessed July 29, 2007.
- "Bart Gellman" biography at The Washington Post, February 11, 2005, accessed July 29, 2007.
- NYT Review of Contending with Kennan
- "Barton Gellman to Marry Tracy Sivitz in September", New York Times, July 22, 1990, accessed July 29, 2007.
- Gellman Official Website
- "Bart Gellman" biography at The Washington Post. February 11, 2005. Accessed July 29, 2007.
- Contending with Kennan: Toward a Philosophy of American Power book description at Greenwood Publishing Group. Accessed July 29, 2007. (Paperback ed.)
- "Interview: Barton Gellman". Conducted on January 29, 2003 for The War Behind Closed Doors. Program first broadcast on Frontline, Public Broadcasting Service, February 20, 2003. Accessed July 29, 2007.
- "Pulitzer Prize-winning Journalist to Discuss U.S. Counterterrorism Efforts Pre-September 11". Press Release announcing lecture by Gellman at Princeton University in 2004. Accessed July 29, 2007.
- "National Security Beat: Barton Gellman". 2006 Washington Post biography. Accessed July 29, 2007.
- Recent Washington Post articles written by Barton Gellman. Accessed July 29, 2007.
- Barton Gellman's interview with The Young Turks.