From 1931 to 1939 he worked in the Department of Fine Arts of the Ministry of Religious Affairs and Public Education (Polish abbr.: WRiOP) and at the same time as the manager of Mobile Art Exhibition and organizer of the Summer Institutes of Folk Arts at Żabie on Huculregion — 1938 and in Zakopane on Podhale region — 1939. Since 1937, he was a delegate of the Polish Minister of Religious Affairs and Public Education to the Interministerial Committee on Folk Industry and Folk Art.
During the communismoppression era - from 1951 - he gave up a regular job, which has not afterwards returned. Trying to survive, he undertook various commercial activities and cultivated research and literary work at home in Podkowa Leśna (where he lived permanently from 1945 until his death in 1976 in Wysokie Mazowieckie).
From 1933 he was married to Halina Klisiński. He had two children (Christine, born 1940 married Kahl, and Andrew, born 1937). He was buried in Powązki Cemetery in Warsaw ("Stare Powązki" - Old Powązki Cemetery) in the family tomb (section 11-1-7/8).
Stanisław Masłowski - Materiały do życiorysu i twórczości (Materials for Biography and Works), Wrocław 1958, ed. "Ossolineum" (in the series "Sources for the History of Polish Art",vol. VII);
Marian Trzebiński - Pamiętnik Malarza (Memoirs of a Painter, a critical analysis and introduction to...), Wrocław 1958, ed. "Ossolineum";
Jarosław Iwaszkiewicz: Rozmowy o książkach (Conversations about Books), Warsaw 1968, ed. "Iskry" Publ., p. 331-334; and of the same author: Sąsiad z Kuklówki (Neighbour of Kuklówka), "Życie Warszawy", 1966, No 44 (of Feb. the 20-21st) p. 4; Zapomniane malarstwo (A Forgotten Painting), "Życie Warszawy", 1967, No 25 (of Jan. the 29-30th) p. 5; Książka trzydziestolecia (A Book of Thirty Years),"Życie Warszawy", 1974, No 173 (of Jul. the 21-22nd), p. 7; Maks, "Życie Warszawy", 1971, No 8 (of Jan the 10-11th), p. 5; Godebscy (Godebski Family), "Życie Warszawy", 1970 (of Aug. the 9-10th) p. 5;
Maciej Masłowski (1901-1976), "Tygodnik Powszechny", 1976, No 38 (1443, of Sept. the 19th). p. 3;
Maria Olszaniecka: Tej książki nie będziemy już czytać - wspomnienie o Macieju Masłowskim (This Book We Will Never Read - Memory of Maciej Masłowski), "Kultura", 1976, No 37 (of Sept. the 12th);