Daniel N. Leeson’s undergraduate and graduate degrees are all in mathematics. Following service in the US Army during the Korean War, he began his career in 1958 as a mathematician, businessman, technician, salesman, systems engineer, and both a scientific and commercial programmer for The International Business Machines Corporation. Following his retirement from IBM after almost 30 years of service, he then taught mathematics at De Anza College in Cupertino, California for an additional 15 years. During those 45 years, Leeson was also a professional performing symphonic musician, playing clarinet, basset horn, and bass clarinet with many professional organizations including the San Jose Symphony, San Francisco Opera, Oakland Symphony, San Diego Symphony, San Jose/Cleveland Ballet, San Francisco Midsummer Mozart Festival Orchestra, and many others. To occupy himself during the hours of travel and overnight stays during his business career, he began a self-study of musicology. He has published at least 50 technical papers in the Mozart Jahrbuch, Eighteenth Century Music, the International Journal of Musicology, the Musical Times, Music and Letters, Musical America, and other journals. He was also a writer of program notes for the London Proms concerts, the Salzburg Mozart Festival, the San Diego and San Francisco Symphonies, the San Francisco Midsummer Mozart Festival, and others. For the 1991 bicentennial commemoration of Mozart’s death, he was musicological consultant to the Ohio State University's Mozart Festival in May, the Columbia River (Washington State) Mozart Festival in early July, and guest lecturer and performer at the Chatauqua Institute in Chatauqua, New York at the end of July. Along with coeditor Professor Neal Zaslaw of Cornell University, Leeson edited the Neue Mozart Ausgabe volume containing the bulk of Mozart’s music for wind instruments, including K. 361, 375, and 388. He is the author of Opus Ultimum:
The Story of the Mozart Requiem (Algora Press, 2006), a novel entitled, The Mozart Forgeries,
(iUniverse, 2006), and co-author for one of the earliest texts on computer programming,
Basic Programming Concepts (Holt, Rinehart, & Winston, 1962). For ten years he was an officer and treasurer of the Mozart Society of America. In both 1992 and 1993, he was a faculty member of the Mozart Opera Studies Institute sponsored by San Francisco State University and California State University in Fresno. Leeson no longer plays professionally but he still contributes to musicological journals and writes fiction, mostly short stories, a number of which have been published.
For his writings he was awarded the 1992 Artist Fellowship for Writers of Creative Nonfiction by the California Arts Council. He is married to the former Rosanne Dryfuss of New York City. They have two children and one grandchild. Leeson can be reached by email at email@example.com. His website is www.leesonbooks.com.