The agency is tasked with promoting the stock exchange's range of indices to a wider audience.
MICEX stock exchange, established in 2004, provides a platform for trading equities, corporate and regional bonds, Russian Federation Eurobonds, stock market derivatives, repos and Exchange Traded Funds.
Merlin director Paul Farrow heads the account, reporting to MICEX PR director Alexey Gerasyuk in Russia. The brief covers all markets except Russia.
Farrow said the agency acquired the brief through its previous work in the former USSR, which includes Kazakh FTSE 100 mining firm Kazakhmys.
The MICEX stock exchange forms part of the MICEX Group, which is the largest universal exchange in Russia, the Commonwealth of Independent States and Eastern Europe.
This month, the MICEX group said its net profits rose by an estimated 30 per cent year-on-year in 2007.