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He worked with his father on the Kalevala cupola frescoes at the lobby of the National Museum of Finland in 1928. In 1931, after his father had died and a fire destroyed his father's frescoes in the Jusélius Mausoleum, he used his father's sketches as basis to repaint the frescoes.
He fought in the Winter War, having risen to the rank of lieutenant. While he was inspecting a downed plane of the Soviet Air Force with captain Adolf Ehrnrooth on either the first or the second day of the war, he and Ehrnrooth were ambushed. He saved Ehrnrooth by throwing himself over him, but he himself died from his wounds.
Jorma and Mary Gallen-Kallela with a guide in Egypt, 1910
Jorma Gallen-Kallela sailing on the school ship Glenard on the Pacific Ocean, 1915
Portrait of Jorma Gallen-Kallela shortly after the Finnish Civil War, 1918
Jorma Gallen-Kallela painting the Kalevala cupola fresco The Defense of the Sampo in the National Museum of Finland, 1928
His father Akseli, U. T. Sirelius and himself
- "Jorma Gallen-Kallela". Artist Register. Artists' Association of Finland. Retrieved 25 August 2020. CS1 maint: discouraged parameter (link)
- "Tarvaspään historia". gallen-kallela.fi. Retrieved 25 August 2020. CS1 maint: discouraged parameter (link)
- Akseli Gallen-Kallelan Museo., & Gallen-Kallela, A. (1985). Akseli Gallen-Kallela, 1865-1931. Espoo, Finland: The Museum. p. 14. OCLC 18733673
- Myöhänen, Raimo (9 July 2009). "Venäläinen desantti ampui Jorma Gallen-Kallelan". puheenvuoro.uusisuomi.fi. Uusi Suomi. Retrieved 25 August 2020. CS1 maint: discouraged parameter (link)
- Gallen-Kallela-Sirén, Aivi (28 October 2001). "Kaikki syytökset peruutettiin". Helsingin Sanomat. Retrieved 25 August 2020. CS1 maint: discouraged parameter (link)
Media related to Jorma Gallen-Kallela at Wikimedia Commons