) was a French

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 diplomat

Diplomat

A diplomat is a person appointed by a state to conduct diplomacy with another state or international organization. The main functions of diplomats revolve around the representation and protection of the interests and nationals of the sending state, as well as the promotion of information and...

.

He began his career as a lawyer

Lawyer

A lawyer, according to Black's Law Dictionary, is "a person learned in the law; as an attorney, counsel or solicitor; a person who is practicing law." Law is the system of rules of conduct established by the sovereign government of a society to correct wrongs, maintain the stability of political...

 (1866), served in the Franco-Prussian War

Franco-Prussian War

The Franco-Prussian War or Franco-German War, often referred to in France as the 1870 War was a conflict between the Second French Empire and the Kingdom of Prussia. Prussia was aided by the North German Confederation, of which it was a member, and the South German states of Baden, Württemberg and...

 and entered the civil service in 1871. He was prefect of the départment of Nord (1882) and of the Rhône

Rhône (département)

Rhône is a French department located in the central Eastern region of Rhône-Alpes. It is named after the Rhône River.- History :The Rhône department was created on August 12, 1793 when the former département of Rhône-et-Loire was split into two departments: Rhône and Loire.Originally, the eastern...

 (1887-1891), and in 1891 became governor-general

Governor-General

A Governor-General, is a vice-regal person of a monarch in an independent realm or a major colonial circonscription. Depending on the political arrangement of the territory, a Governor General can be a governor of high rank, or a principal governor ranking above "ordinary" governors.- Current uses...

 of Algeria

Algeria

Algeria , officially the People's Democratic Republic of Algeria , also formally referred to as the Democratic and Popular Republic of Algeria, is a country in the Maghreb region of Northwest Africa with Algiers as its capital.In terms of land area, it is the largest country in Africa and the Arab...

, where he had served in a minor position in 1874.

He was nominated French ambassador at Washington D.C. in 1897, and in that capacity negotiated the preliminaries of peace on behalf of the Spanish

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 government after the war with the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. He was serving as the French ambassador to the United States during the War of 1898

Spanish-American War

The Spanish–American War was a conflict in 1898 between Spain and the United States, effectively the result of American intervention in the ongoing Cuban War of Independence...

. He was an active participant in the peace negotiations between Spain

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 and United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 and a contributor to the final agreement, the Treaty of Paris of 1898

Treaty of Paris (1898)

The Treaty of Paris of 1898 was signed on December 10, 1898, at the end of the Spanish-American War, and came into effect on April 11, 1899, when the ratifications were exchanged....

. His role in those negotiations helped Spain and France to develop a strong political partnership.

He was transferred in 1902 to Madrid

Madrid

Madrid is the capital and largest city of Spain. The population of the city is roughly 3.3 million and the entire population of the Madrid metropolitan area is calculated to be 6.271 million. It is the third largest city in the European Union, after London and Berlin, and its metropolitan...

, and in 1907 to Berlin

Berlin

Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...

, where he served as French ambassador to Germany until the outbreak of World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

 in 1914, and then as the head of the political section of the French foreign ministry during the war. His brother, Paul

Paul Cambon

Pierre Paul Cambon was a French diplomat and brother to Jules Martin Cambon.-Biography:He was called to the Parisian bar, and became private secretary to Jules Ferry in the préfecture of the Seine...

, was also a notable French diplomat.