This tribute to Bob O'Malley is reprinted from the April 2021 issue of SIAM News (Volume 54, Number 03) https://sinews.siam.org/Details-Page/obituary-robert-e-omalley-jr. It is reprinted here by permission of SIAM and the authors. Further articles on Bob's contributions to ICIAM and the international applied mathematics community will appear in the next issue of ICIAM Dianoia.
Bernard Deconinck, Mark Kot, Randall J. LeVeque, and Ka-Kit Tung are faculty in the Department of Applied Mathematics at the University of Washington. All four interacted extensively with Bob O’Malley for many years.