After studying at the Vizcaíno Institute, Aznar obtained the title of industrial engineer in
Barcelona in 1893, specializing in
mechanics. When he returned to Bilbao, he joined the family mining business and, above all, the shipping business. In March 1902, Alberto and his two older brothers Eduardo and Luis María (1862–1929) formed the limited partnership
A. Aznar y Compañía, in which Alberto had 15 percent of the capital and 20 percent of the profits. When their father died without a
will three months later on 15 June 1902, there were quarrels between his brothers, but in the end, all three inherited their father's political affiliation linked to monarchical conservatism. Furthermore, all three were deputies and senators of the
Conservative Party, as well as important shipowners and industrialists of their time. In the late 1890s, Alberto and his older brother Eduardo promoted the creation of other shipping companies:
Compañía del Vapor Alaveaga (1898) and
Compañía del Vapor Axpe (1899), which were followed shortly by the
Compañía de Navegación Bat and the
Vasco Cantábrica de Navegación, with a capital of 1,250,000
pesetas. He was one of the promoters of the
Asociación de Navieros de Bilbao (Bilbao Shipping Association). In 1917, Aznar became part of the first board of directors of the
Altos Hornos del Mediterráneo, and he was also briefly a member of the
Banco of Bilbao, since the appointment was agreed on 8 March 1923. ==Political career==