In August 2007, Dobrin relocated to Saint Petersburg to train under Alexei Mishin. He placed 5th at the 2007 NHK Trophy. He withdrew from the 2008 Russian Championships and finished 13th at the 2009 Russian Championships. In 2009, he left Mishin and joined Victoria Volchkova in Moscow. After placing 12th at the 2010 Russian Championships, Dobrin retired from competition. He worked as a coach in Prokopyevsk, Kemerovo Oblast from 2011 to 2014 and then relocated to Krasnodar.