Atomic, a Grayling agency, has been appointed by London’s second largest quality minicab service, greentomatocars.

Atomic will raise awareness of the environmentally friendly private hire company amongst consumer and business audiences. Daniel Cohen, MD at Atomic, will head up the account.

Following the success of its appointment by greentomatocars, the agency is expanding its UK team with two new hires. Sinead O’Conner joins the company as an account manager from Champion Communications, where she managed the PR programme for Peer 1 Hosting, taking its share of voice from 14.9% to 25.6%. Also joining Atomic is Josh Hoppen as an account executive. Hoppen was previously at Frank PR, where he provided support for the launch of Activision’s Call of Duty: Modern Warfare 3, the biggest gaming launch in UK history.