He was admitted to the École polytechnique in 1871, training for the artillery. In 1878, he served with the 23rd Artillery Region and became in charge of the manufacture of munitions in Tulle. He became Captain in 1878 and Officer of Ordnance for Minister of War Georges Boulanger in 1886.
A brilliant officer of the general staff, he was noted in 1895 as being "of exceptional intelligence, perfect conduct in service, well-honed knowledge both military and general, great aptitude for service in the general staff. such as these are in the resume of the qualities of." Later, when he was publicly Jewish, Pierre Rocolle wrote that "there is nothing which proves the claim of the anti-Semites that there was a correlation between the Dreyfuss affair and the flattering promotions which.. they received."
Promoted to squadron leader in 1889, he became Colonel in 1902, when he was commander of the École d"application de l"artillerie et du génie.
In 1903 he became chief of staff for the 11th Artillery Regiment, where he was appreciated enough to be named chief of staff for General André in 1904, then Maurice Berteaux in 1905. At the onset of the First World War, he commanded a group of reserve divisions in the Fifth Army of General Charles Lanrezac.
Valabrègue"s divisions were dissolved on September 30, 1914, when Lanrezac was sacked by Joffre. He then became inspector for camps and infantry depots until 1917, when he retired into the reserves.
He died on March 26, 1934 in Paris.