[4] On 15 August 1934 he became the successor of François Adrien Juvanon as a governor of French India, he held this position until October 1936.
[5] On 21 April 1939 he became the Governor-General of French Equatorial Africa, he remained in office until 3 September 1939.
[6] On 7 November 1940 Solomiac took over from Jean Alexandre Léon Rapenne the interim post of Governor of Niger.
[7] However, he was deposed by the Vichy regime as being not loyal to them, and was replaced on 8 December 1940 by General Maurice Falvy.
In August 1944, Léon Solomiac was entrusted with the management of official duties of the prefecture of Tarn.