He was a Romanian painter and graphic artist of Jewish origin, a member of the Romanian Academy, and studied in Munich and Paris.
Initially he was inspired by the expressionist current, painting with thick lines and sharp angles, with a color in which earthy tones predominate.
After graduating, Iser worked for the socialist press at Fada and the Truth, where he published a large number of cartoons; The satirical drawings approached the problems of the Romanian society through the prism of the class conflict and were addressed especially to the monarchy and the bourgeoisie, emphasizing at the same time, the role of the labor movement.
During his maturity, Iser’s painting includes life scenes on Dobrogean themes with portraits of local Tartars.
Adopting a brighter color with an exotic touch, the compositions acquire balance and monumentality. After World War II he painted socialist themes again, especially portraits of workers.
In 1955 he was elected a member of the Romanian Academy, and died in 1958 in Bucharest.