A member of the Union for French Democracy (UDF), he was a deputy in the National Assembly from 1976 to 1981 and from 1986 to 2002, as well as a city councillor in Nice from 1965 to 1983.
Ehrmann was born in Paris to a family from Alsace, who had moved there in 1871 after their home region was annexed by Germany in the aftermath of the Franco-Prussian War.
[1][2] Ehrmann was a teacher of history and geography at the Lycée Masséna in Nice, exercising his profession between 1937 and 1975.
[1][2] In February 1976, Ehrmann replaced Jacques Médecin as deputy in the National Assembly for Alpes-Maritimes's 2nd constituency, as the latter was nominated for government.
Mayor Christian Estrosi of Nice remembered him as a "great humanist, pupil of the nation, deeply European and impassioned defender of the cause of sport".