Gill has worked for Bouygues Construction both within the UK and internationally and was well respected.
A spokesman for Bouygues UK said: “He has held a number of pivotal trusted roles and his track record has been exemplary.
“His role over the past five years has been very much focussed on integrating acquired businesses, developing the Bouygues UK residential offer and implementing change management programmes to bring the business back to profit.
“With these challenges successfully achieved and in addition having secured the delivery of a healthy new pipeline, Darren has now decided that he wishes to pursue new opportunities outside Bouygues UK.”