Thanks as always for your valuable input. First the two answers that were almost but not quite posted: the advice to ‘omit’ is minimalist and bold, perhaps an idea before its time; ‘by trade’ would have been the literalist approach but the term has rather vulgar connotations that are out of place in this context. Many thanks to Stephen, David and Sandy for the three answers that were posted. I felt that ‘avowed’ came closest to the sense here. My own final version reads: ‘who rejoices in the title of…and is also’.
For a discussion of use/abuse of the ‘vote non-pro’ button see
http://www.proz.com/post/307489 ).