 In April 2017, "Het Gelders Orkest" announced that they had secured the services of Flor for an extended guest conductor relationship, without the formal conferring of a title such as 'principal guest conductor'.In June 2017, the Orchestra Sinfonica di Milano Giuseppe Verdi announced the appointment of Flor as its next music director, effective with the 2017-2018 season, with an initial contract of 3 years.Outside of Europe, Flor served as principal guest conductor with the Dallas Symphony Orchestra from 1999 to 2008.