 He is an Honorary Associate Member of the Moscow Mathematical Society and has received Honorary Recognition for Service to St. Petersburg and Russian Mathematics and Mathematicians.Jaco has held the distinguished positions of Regents Professor (2008) and Grace B. Kerr Professor at Oklahoma State University where he was recognized as the 2017 Eminent Faculty Member and in 2019 recognized as Regents Distinguished Research Faculty member.He has also held the Lois and Fred Gehring Distinguished Visitor Chair at University of Michigan.