Kochetov Joachim Semenovich (1789-1854), archpriest. He was among the first graduates and later professor of the St. Petersburg Theological Academy (1814-1851). Since 1841 he was professor ordinarius at the Imperial Academy of Sciences. At the Lyceum (1817-1854) he taught Divine law of the Orthodox confession: catechism and sacred history, canon law, moral theology, and since 1843 - experimental psychology and logic. Member of the Lyceum Conference. Since 1852 - Professor of Theology and Philosophy at the Lyceum. At the same time he was the students’ confessor. I. S. Kochetov’s three sons studied at the Lyceum "at the Treasury expense".

Besides teaching at the Lyceum, I. S. Kochetov was a law teacher at the Engineering (Mikhailovsky) School (1823), as well as a member of the committee "established to assess harmful books printed in Russia" (1824). From 1832 he occupied the position of the Peter and Paul Cathedral Dean, Dean over the churches of Saint Petersburg and the Vyborg side, and censored the sermons to be delivered by the clergy subordinated to him. I. S. Kochetov was the Rector of the Petropavlovsk Theological School, a member of the consistory. As a member of the Russian Academy of Sciences, he participated in the compilation and publication of “The Dictionary of Church Slavonic and Russian Languages”. In 1824 Kochetov received a Doctorate degree in Theology for his book "Features of the Active Doctrine of Faith". The book became a teaching aid for the study of Devine Law in the Lyceum, and went through 5 editions.