Since 1977 he is Professor of Economics at the Berlin Free University, where he directs the entrepreneurship department since 2003. Several years ago he was appointed German Academic Exchange Service visiting professor in Asia. He conducted a scientific series of lectures and workshops, a. o. in the US, Canada, Mexico, Brazil, Japan, South Korea, Thailand and India.
In 1985, he founded "Projektwerkstatt GmbH" with the idea of "Teekampagne" ("tea campaign"), a tea import company which in 1995 became the world's largest importer of Darjeeling leaf tea. Teekampagne is Germany´s market leader in mail-order tea sales. The company turned the German tea market upside down by betting on consumer education, transparency, and traceability. Faltin introduced a new business model: selling pure Darjeeling tea, controlled for chemical residues, in large packages, by mail order, at extremely competitive prices, while supporting the economy and ecology of the region of Darjeeling. In 1992 Faltin launched and sponsored the reforestation project S.E.R.V.E. (“Save the Environment & Regenerate Vital Employment"); the WWF is taking charge of the project on location in Darjeeling, India. The company also introduced waterhyacinth furniture to Germany. In 2006, he started the “CO2-Kampagne". He is business angel and coach of startups such as “eBuero AG" (2001) and RatioDrink AG" (2005).