The general governor of Dalmatia, Alvise Contarini, knowing his abilities and versatility, appointed him as his secretary and interpreter.

Returned to Venice in 1759, Lorgna became a student at the University of Padua; he didn't graduate, but learned physics, astronomy and mathematics under Giovanni Poleni and Giovanni Alberto Colombo.

[1] In 1762 he enrolled in the Venetian army and went to Croatia for some time, then was appointed professor of mathematics in the military academy for engineers in Castelvecchio in Verona.

[2] Lorgna worked at the Military College of Castelvecchio for the rest of his career, teaching courses on trigonometry, mechanics, statics for construction, ballistics and hydraulics.

From 1784 he was also the general governor of the college, attaining the military rank of Brigadier.