In 1968, he worked as a television producer for Sveriges Radio and made a series about science fiction.
[1] This work was compared favorably to other studies of science fiction coming out at that time, such as New Maps of Hell, Billion Year Spree, Seekers of Tomorrow, In Search of Wonder, and The Universe Makers.
[2] In the summer of 1973, he left A&K and worked with Delta Förlag that he ran together with the literary agent Gunnar Dahl.
Lundwall was also the editor of the science fiction magazine Jules Verne-Magasinet between 1972 and 2009 and has been active in fandom, for instance he organised conventions in Stockholm in 1961, 1963, 1973, 1975, 1977 and 1979.
He has been both a board member and chairman (twice) of World SF and north European coordinator for Science Fiction Writers of America.