The UK incumbent, Starcom MediaVest Group, will not repitch. The agency has held the account for more than 15 years.
The process is being overseen by AAR, and DMG plans to appoint an agency in May.
Roland Agambar, the chief marketing officer at DMG, said: "With a change and evolution in our marketing strategies, it seemed the right time to review our media agency.
"This process will allow us the opportunity to look at the market and find an agency that delivers against our specific requirements going forward. We would like to thank SMG for all their support and wish them every success in the future."