[2] Lindsjö served as battalion physician in the Swedish Army Medical Corps in 1921.

[1] Lindsjö was a member of the International Commission for the Exchange of Greek-Turkish Prisoners of War in 1923.

Lindsjö then served as field physician in the Southern Army Division (Södra arméfördelningen) the same year.

[2] On 2 October 1943 he resigned as acting Surgeon-Field General, thereby pointing out his dissatisfaction with the need for improved military medical care had not been satisfied.

[2] Lindsjö was chairman of the Svenska skolläkareföreningen (”Swedish School Doctor Association”) from 1938 to 1942 and Svenska läkaresällskapets sektion för pediatrik och skolhygien ("Swedish Medical Association's Section for Pediatrics and School Hygiene") from 1942 to 1944.