Dental payment plan company Denplan has hired Big as its lead digital agency.
Leicester-based Big will be responsible for Denplan's overall digital strategy including website development and pay per click.
Big's digital team has also been working on the launch of a new rollercoaster at Thorpe Park.
The Swarm will open at the theme park next year and Big has created its website and a social media campaign to build anticipation.
The site uses Google Maps and Street View to bring the ride's apocalypse theme into people's homes. Exclusive ride footage and 'conspiracy theories' will be leaked on to The Swarm's Facebook page to maintain interest until it opens.
Dan Neville, digital director at Big, said: "By combining social media technologies we’ve created a compelling piece of digital storytelling."