After six years as a Brunswick partner, Smith is setting up West Bridge Consulting to offer reputation management and corporate comms consultancy for firms across Russia.
Smith said in a statement: 'My friends in Moscow have all been telling me that now is the time to invest in Russia.
'I have decided, therefore, that it is time to back this judgment with my own money.'
At Brunswick, Smith worked on developing the firm's public policy, corporate and Russian practice areas, working with clients including Group 4 Falck, Nomura Principal Finance Group, Mitsubishi Electric Europe, Yukos Oil Company, the Expert publishing group in Moscow and the Administration of the President of the Russian Federation.
Before Brunswick, Smith was UK National Consumer Council director of public affairs in the 1980s.