Tatton took-up his new role as managing director for housing at Willmott Dixon last week.
Tatton left ISG in May after eight years at the firm when he was replaced by Alan McCarthy-Wyper.
He will be based at Willmott Dixon’s Shefford office in Bedfordshire overseeing work across North London and Northern Home Counties.
A Willmott Dixon spokesman said: “Craig is a great appointment to a very strong management team and will help lead our ambitious housing growth plans.”