Robert Lamontagne, who has been the city’s acting manager since Hébert’s resignation, was selected today by a non-partisan committee.
Michael Applebaum said in a statement on Friday that Lamontagne had his full confidence.
"He knows the municipal system and is aware of the challenges currently faced by City Hall," Applebaum said.
Lamontagne's appointment follows Hébert's March 18 resignation after he was accused of trying to oust Montreal police chief Marc Parent.
Hébert has maintained that he never specifically asked to have the police chief replaced.
Lamontagne has worked with the City of Montreal for 10 years and formerly served as finance director.