Breakwell left his most recent agency role - director of healthcare at Beattie Communications - last autumn after only a year.
Both Breakwell and Beattie CEO Gordon Beattie described his exit as amicable. They recently teamed up to pitch jointly for business.
Breakwell said he had ‘long-term contracts' to work with two undisclosed consultancies, as well as Beattie, and since leaving the agency had also undertaken a brace of issues management projects.
Beattie's health team is now being overseen by senior account director Sophie Taylor-Roberts.