Wiseman (pictured) joined the business as research director in 2010, heading up the technology, media and telecoms team, with an additional brief to bring ICM’s analytics in-house. He was promoted to managing director of ICM Research and ICM Direct in 2012.  

The company confirmed in a statement that Wiseman has left the business.

Tim Bonnet, president of the Unlimited Group, said: "Andy has successfully implemented a great deal of change over the past five and a half years and we are extremely grateful for the contribution he has made to ICM’s development. Andy has led the business with great energy and commitment and has built a very strong team at ICM that he can be proud of."

The company has not appointed a replacement for Wiseman. Jane Rudling continues to lead the insight business at the Unlimited Group, and ICM Unlimited reports in to her.

Wiseman said: "I’ve had a fantastic seven years at ICM, and been hugely fortunate to work with some brilliant people and fantastic clients. I’m proud of what the team achieved during my time, and now feels like a good time to try something new.

He added: "I’m exploring a number of opportunities across insight, data, advertising and consulting, where I hope to be able to continue to use my strategic thinking and leadership skills."