Rosenblad was a member of the Swedish Bible Society and the Swedish Mission Society, and on 21 May 1805 he became an honorary member of the Royal Swedish Academy of Letters, History and Antiquities. From 1804–1806 he was president of the Pro Fide et Christianismo society.
Rosenblad was a part of the Swedish Bible Society and the Swedish Mission Society, and on 21 May 1805 he became an honorary member of the Royal Swedish Academy of Letters, History and Antiquities. From 1804–1806 he served as president of the Pro Fide et Christianismo society.