[1] He was an important contributor to development of the Société française radio-électrique (SFR: French Radio Telephone Company) created in 1910 by Joseph Bethenod and Émile Girardeau.

Members of the group included Henri Abraham, Maurice de Broglie, Paul Laüt and Lucien Lévy.

[6] Brenot, as vice-president of the Syndicat Professionel des Industries Radioélectriques, became a member of the lobbying group Radio-Agricole Française (RAF), founded in 1927 by the former minister of agriculture Joseph H. Ricard.

[10] In June 1936, Brenot undertook to form a group of employers that would support social policy as an alternative to the Confédération générale du patronat français (CGPF).

He made sure it did not include Alexandre Lambert-Ribot, secretary of the Comité des forges and representative of the heavy industry oligarchy.

Louis Germain-Martin, a radical right wing former minister of Finance with corporatist leanings, was elected president of the CPAS on 27 January 1937.

[10] During World War II (1939–45) Brenot had the title of technical director of the SFR, but was the right-hand man of the owner, Émile Girardeau.

[14] In his defense, Brenot said that Telefunken's permanent representative in Paris, Doctor Schultz, was a former composer and virtuoso pianist with whom he had formed cordial relations before the war, and who was liberal, anti-militaristic and anti-Nazi.