[1] On 20 February 1808, he enrolled at the Royal Swedish Academy of War Sciences as an artillery staff officer.

He was ennobled in 1799 for his father's merits with the name “af Wingård.” In addition to his duties, he was active as a painter and illustrator, and, according to Fredrik Boije, was a great art enthusiast and skilled draftsman.

Wingård is represented at Uppsala University Library[4] with a red chalk drawing of a study head of a bearded man.

Wingård published several works, including Militäriska paradoxer (Military Paradoxes, 1809), Uppsats om artilleriundervisningen (Essay on Artillery Education, 1816), Håkan Westgöthe, Läsning för menige man (Håkan Westgöthe, Reading for Commoners, 1828), Minnen af Händelser och Förhållanden under en lång lifstid (Memoirs of Events and Circumstances During a Long Lifetime, 1846–1850), and En Pietists resa till sin Graf, Allegorisk imitation (A Pietist's Journey to His Grave, Allegorical Imitation, 1851).

On 21 February 1854, he died childless in Stockholm, thereby ending both his own family and the entire noble lineage on the male side.

He was married on August 18, 1810, at Partille in the parish of the same name in Göteborg and Bohus County to Fredrika Björnberg, from whom he was later divorced.