John Doyle Group

John Doyle Group was a British civil engineering contractor, specialising in substructure, superstructure, basements and infrastructure works.

The company was founded in 1966, and based in Welwyn Garden City, with other offices based in Warrington and Derby.

Civil engineer Stef Stefanou joined the company early on, and over time became its owner and chairman.

In 1999, Accord, a business, environmental, highways, housing and technical services was spun out and headed up by his brother Stelio Stefanou. On 21 September 2007, after eight years of growth, Accord was acquired by Enterprise plc for £180 million.

On 12 June 2012, the administrators were called in. The company had a £80 million turnover and employed 260 people.