Teuku Iskandar later returned to Leiden to serve as the lecturer. Within his alma-mater (Leiden University) educational environment, he became a prominent and ultimate professor for Acehnese and Malay literature, and also gave special classes in the Acehnese language. As an Acehnese enthusiast, he also continued to produce his works related to Aceh including "the Catalog of Acehnese Manuscripts" (compiled with Voorhoeve), two large volumes of "the Catalog of Malay, Minangkabau and South Sumatra, and Manuscripts" (in the Netherlands).