Jankulovski preserves and upgrades the OSTEN brand (founded in 1945 by the most important Macedonian writers, artists and intellectuals such as: Blaže Koneski, Slavko Janevski, Vlado Maleski, Aco Shopov, Vasilije Popović - Cico and many others...)
He successfully continues to develop the World Gallery of Cartoons (founded in 1969), he is the founder of the renowned international events OSTEN BIENNIAL of Drawing, OSTEN BIENNIAL of Awarded Artists and the OSTEN ART Festival. In the OSTEN MUSEUM of Drawing, it incorporates its extraordinary ability as a collector, so that today the collection counts more than 15,000 works, including works by the greatest artists in the world art history such as: Picasso, Vasarely, Miró, Dali, Rembrandt, Abramović, Christo, Soulages, Kabakov,... and almost all most important cartoonists in the world.

Other professional and social activities
- Founder and the first President of the Film Youth of the Republic of Macedonia
- President of the Academy Cinema Club Skopje
- One of the founders and current president of ZKM (Association of Macedonian Cartoonists)
- One of the founders of FECO (Federation of Cartoonists
Organizations)
- Editor and deputy editor-in-chief of "Studentski Zbor" (1975-1989)
- Organizer of the Yugoslavian contest for satirical drawing (1980-1990)
- One of the founders and first Director of the Youth Film Forum (1985 - 1986)
- Editor and managing editor at MRTV, Macedonian Radio and Television (1990 - 2009)