Mike Robb, executive director at Cicero Group, said: "2014 has been an interesting year for the markets but we expect increasing activity over the next 12 months.
"With that increasing pipeline of activity comes the need for a genuinely integrated offer for clients, and I am delighted that Joanna has joined at a crucial time for Cicero as we look to expand our capital markets expertise for clients."
Crawford said: "I am delighted to be joining Cicero at such an exciting time for the business and look forward to working with the rest of the team to continue growing the communications offering."
Cicero Group is an integrated comms agency specialising in corporate PR, government relations and digital comms. Its headquarters is in London, with offices in New York, Brussels, and Singapore, employing about 50 people and overseeing more than 200 clients.