Sedney was the oldest bridge player of Suriname. In 1997, he published "De toekomst van ons verleden" (The Future of Our Past), a political history of Suriname from 1948 onward. This book included evaluations of Suriname's parliamentary democracy prior to the coup d'état and provided recommendations for strengthening democracy. Successive editions were published in 2010 and 2017. In 2016, he was awarded honorary membership by the VHP. In 2016, the New Harbour in Paramaribo was renamed "Dr Jules Sedney – Haven van Paramaribo" to recognize his involvement in its founding.