Ján is fifty years internationally active in Regional planning, Town planning, Architecture, Landscaping, Interior design, Design, Development, and Lecturing. He has worked in USA, France, Italy, Spain, Austria, Portugal, Russia, Ukraine, Thailand, Singapore Congo, Algeria, Mauritania, Oman, Kuwait, China, Czech and Slovak Republics. He acted as Director of town planning and architectural offices and has been responsible for Master plans for governments, city centers, residential areas, banks, embassies, multifunctional buildings, VIP residences and hotels.
His pedagogical activities cover the University of California /UCLA / and others with stress on the formation of "Way of thinking” and "Scenario of projects", stress on philosophy and value on how to work with client and economy of design. Ján speaks 6 languages including Arabic and Swedish.