 In 1892 he became "professeur agrégé", followed by "chirurgien des hôpitaux" two years later.In 1906 he succeeded Guyon as director of the clinic of urology at Hôpital Necker.Albarrán's early career was largely spent in the fields of microbiology and histopathology, later switching to urology, a discipline in which he made several important contributions.