CNC's Moscow bureau will be headed by Andreas Meyer-Landrut, formerly German ambassador and recently head of the DaimlerChrysler group representative office in Russia.
The Paris office will be run by ex-journalist and public affairs consultant Pierre Janin.
CNC - which already has offices in London and Munich - was co-founded by Klein and ex-DaimlerChrysler PR head Christoph Walther.
Staff at the Moscow and Paris offices will service both existing clients and hunt out new business opportunities.
CNC bosses said expansion will continue with branches planned in another European city - possibly Brussels - and in North America.