Soudas was initially the prime minister's press secretary before being named director of communications in 2010.
He will report to the COC chief marketing officer Derek Kent as of Oct. 1.
"Dimitri's leadership experience in communications, his background in government and understanding of global affairs, makes him an outstanding addition to our executive leadership team," Chris Overholt, CEO of the Canadian Olympic Committee said in a statement.
Soudas, from Montreal, will provide overall direction, management and a strategic view for all Canadian Olympic communication activities, according to the COC.
"I am thrilled to join the Canadian Olympic Committee and looking forward to working with athletes, NSF’s and leaders like Marcel Aubut, Chris Overholt and Derek Kent and the entire Canadian Olympic Team," said Soudas.