| 1904 |
Frank Hogan (1877-1944) opens law office in Washington, D.C. |
| 1915 |
Frank Hogan represents Riggs Bank in perjury cases filed by federal government, calling former Presidents Roosevelt and Taft as witnesses; jury acquits all defendants. |
| 1918-1924 |
Frank Hogan represents defense contractors in “War Fraud” cases; all clients acquitted. |
| 1925 |
Nelson Hartson, former Solicitor of Internal Revenue, joins Frank Hogan’s law firm; tax practice established. |
| late 1920s |
Firm’s communications law practice established, led by John Guider. |
| 1924-1930 |
Teapot Dome scandal erupts; oil magnate Edward Doheny, represented by Frank Hogan, is acquitted of conspiracy and bribery charges. |
| 1933-1936 |
Firm represents plaintiffs in “Bonner-Griffith” libel cases against Hearst newspapers. |
| 1934-1937 |
Frank Hogan successfully defends Andrew Mellon in celebrated tax fraud case. |
| 1935 |
Frank Hogan appears on cover of Time magazine; described as “the federal government’s No. 1 legal antagonist.” |
| 1938 |
Firm converts to partnership and adopts new name, “Hogan & Hartson.” Frank Hogan serves as President of American Bar Association. |
| 1965 |
Sara-Ann "Sally" Determan joins firm and in 1975 becomes first female partner; firm has 43 lawyers in Washington, D.C. office. |
| 1969 |
Vincent Cohen joins firm and in 1972 becomes first black partner. |
| 1970 |
Firm establishes separate practice group devoted exclusively to providing pro bono services and is first major law firm to do so. |
| 1973 |
Time magazine names former Hogan & Hartson partner and Chief Judge John J. Sirica "Man of the Year" for presiding at Watergate trial. |
| 1975 |
Sen. (D-Ark.) J. William Fulbright, creator of Fulbright fellowship for international study program, joins Hogan & Hartson. |
| 1980 |
Rep. Paul Rogers (D-Fla.) joins firm to establish health law practice. Samuel Berger and Gerald Gilbert establish firm’s full-scale international trade practice. |
| 1983 |
Litigation practice expands to include products liability and toxic torts. |
| 1985 |
Firm opens first office outside of Washington, D.C. in Northern Virginia. |
| 1988 |
Baltimore office opens. |
| 1990 |
Firm opens first international office in London. |
| 1991 |
Firm earns prestigious Pro Bono Publico Award from the American Bar Association, recognizing the firm's accomplishments as a leader of pro bono work nationally. Offices open in Brussels, Paris, and Warsaw. |
| 1993-2001 |
Domestic offices open in Denver, Boulder, Colorado Springs, Los Angeles, New York, and Miami; international offices open in Moscow, Tokyo, and Berlin. |
| 2002 |
Beijing office opens. |
| 2004 |
American Bar Association awards firm its John Minor Wisdom Public Interest and Professionalism Award for its representation of blacks incarcerated and wrongly convicted in Tulia, Texas on the basis of race. Firm's efforts led to pardons for our clients and the largest civil rights settlement in West Texas history. Munich and Shanghai offices open. |
| 2005 |
Former Hogan & Hartson partner John Roberts, Jr. becomes Chief Justice of the United States. Hong Kong and Caracas offices open. |
| 2006 |
The American Lawyer names Hogan & Hartson to the magazine's prestigious A-List — the top 20 firms in the United States. |
| 2007 |
Working Mother magazine and Flex-Time Lawyers LLC names Hogan & Hartson a “Best Law Firm for Women.” |
| 2008 |
Firm has more than 1,100 lawyers in 25 offices worldwide, including Abu Dhabi. |