His first church windows were for Sainte-Agnès, Maisons-Alfort and participating in the design for Notre-Dame de Paris in 1937.
He was drafted for military service in 1939 and fell into captivity at Hoyerswerda in May 1940.
He returned from captivity only in 1945.
He divorced his wife in 1946 and married Marie-Alberte Madre-Rey, with whom he had two children.
He was artistic director of Milano interior design company Fontana Arte during 1954–1967.
He was elected president of the French scouting association (Association Française de l'Éclairage) in 1968.
He founded the company Verre Lumière, one of the first producers of halogen lamps, in 1968.
Ingrand created numerous church stained glass windows during the late 1940s to 1960s (in some cases replacing windows that had been destroyed in World War II) including windows in
Pontoise Cathedral (1955),Strasbourg Cathedral (1956),
the chapels of Château de Blois (1957), Château d'Amboise, Château de Chenonceau and Château de Caen,
Saint-Pierre de Yvetot (at 1046 m² the largest stained glass window in Europe),
Saint-Pierre de Montmartre,
Rouen Cathedral,
Beauvais Cathedral,
Saint-Malo Cathedral,
Tours Cathedral,
Church of the Jacobins,
Münster Cathedral (1961),
Liège Cathedral (1968),
São Paulo Cathedral,
Washington National Cathedral (with Claude Serre),
Cathedral of the Risen Christ (Lincoln, Nebraska) (1964),
St.
Dominic Church in San Francisco,
the Basilica of the Annunciation, Nazareth.
Max Ingrand was noted for his modern designs.
This can be seen in the stained-glass windows behind the main altar at the Basilica of St Michel Church in Bordeaux (Ref: https://ourtapestry.blog/basilique-of-saint-michel-2/).
Ingrand died unexpectedly from influenza in Paris in 1969.