Krebs, who was a director in the VTB IR team, has more than ten years' experience in IR, financial comms and financial journalism.
With the exception of chief executive Tom Blackwell, EM staff do not have job titles; however, a spokesman said that Krebs would be a senior member of the financial comms team, with a particular focus on investor relations.
Blackwell said: "Some question whether now is the time to be investing in Russia. At EM, we believe this is a foolish question. It is in markets like this that outstanding communications advice is needed most.
"With his years of experience on the front line of VTB IR and a solid grounding in financial journalism, Yuri is just the kind of addition to our team that we need to be able to continue helping our clients navigate successfully through choppy waters."
Krebs added: "I have had the opportunity to work directly with the EM team as a client since its inception four years ago. I know from first-hand experience that the depth and quality of its offering is world-class and of substantial value to corporates in Russia."