The agency won the account following a competitive pitch process believed to have involved eight agencies.
College Hill will help the iconic haulage company enter a new phase in its development following its listing on the stock exchange last year - the firm will look to become more of a multi-modal transport and logistics provider rather than one focussed primarily on road transport.
Managing partner Mark Garraway, supported by partner Gareth David and account executive Anna Czerny, will report to Julie Gaskell, head of communication at Stobart.
Gaskell commented: ‘Stobart Group went through a rigorous process to select a Financial PR Agency and we had an excellent shortlist. College Hill interpreted our needs well and was able to demonstrate ways in which they could create - not just add - value.'