Worthy, who has already started at the agency, will develop public regulatory affairs for the financial sector, by helping clients understand UK and EU regulations.
Worthy has previously worked as a policy adviser at the Financial Services Authority and the Association of British Insurers.
Most recently she ran her own strategic comms consultancy, Worthy Communications, where she worked with SMEs, charities and regulatory organisations.
She will report to Ben Curson, head of financial and professional services at the agency.
Curson commented: ‘Following continued business growth and new wins, Melanie joins at an exciting time. Her strong regulatory credentials and contacts will be invaluable to our clients now facing a period of unprecedented regulatory change and uncertainty.’