Susi Jeans' concert tours took her all over Europe, the United States and Western Australia. She adjudicated major international competitions and from 1967 held a post at the University of Colorado. She is regarded as an important champion of historically-informed performance and of historically-aware restorations of old instruments.
Her scholarly interests ranged widely from organs, harpsichords and keyboard music, British music especially of the seventeenth and eighteenth centuries, Austrian music, to topics as diverse as William Herschel, mountaineering and natural medicine. She published many articles in scholarly journals, as well as editions of music. Her pupils included many notable musicians: George Guest, Peter Hurford, David Lumsden, Davitt Moroney, Tim Rishton, David Sanger and others.
Lady Jeans bequeathed her house to the Royal School of Church Music in order that it could remain a centre for musicians. When the Royal School of Church Music relocated to Sarum College in Salisbury the Cleveland Lodge buildings, much restored and modified using Lottery money, were sold to property developers who have carried out controversial demolition and building work, some of it without planning permission.
"Lady Jeans at 70: a Conversation with Gillian Weir", Organists' Review 67/2 (1982), 9–14
Guy Oldham, "Susi Jeans: a Seventieth Birthday Tribute", Musical Times 122 (January 1981), 47-49