Subsequently, he joined Le Monde de la musique where he was successively head of department and deputy editor-in-chief (1981–1988).
In 2002, Jean-Marie Colombani, the director of Le Monde, asked him to deal with the strained relations between the editors of the daily and the website lemonde.fr.
At le Monde, Alain Lompech published numerous reviews of concerts, recitals and operas, as well as a large number of surveys on French and international musical life.
He has been a member of the entrance and exit jury of various conservatories and music schools and of several international piano competitions (Naples, Monte Carlo, Rio de Janeiro, São Paulo).
In 2012, he published at Buchet Chastel a collection of forty-four portraits devoted to some great pianists of the twentieth century, including 12 women.