Complex sentence: His former classmate and old friend, Yuri Grigorievich Samokhvalov, recently appointed assistant manager of the institution, suggests appointing Novoseltsev as a head of the light industry department, but Kalugina rejects it believing that Novoseltsev is not good enough for the position.
Split into simpler sentences: His former classmate and old friend, Yuri Grigorievich Samokhvalov, recently gets appointed assistant manager of the institution. Nonetheless, Samokhvalov suggests appointing his old friend as a head of the light industry department, but Kalugina rejects it believing that Novoseltsev is not good enough for the position.