The postholder will report directly to the body's CEO, currently filled in an acting capacity by Jonathan Tross.
So far the interim team, which has been in place since last year, has been engaged in internal comms work, communicating to the body's 2,000 advisers across the UK.
The head of communications is tasked with building the first PR team and developing media relations campaigns.
The interim team includes consultant Maria Darby as acting head of comms.
CAFCASS was created in April last year to advise the courts on practice for dealing with children in adoption, care and contested residency cases.