Giles is married to Sue with two adult children. He is a Chartered Surveyor. He has been managing Church Growth Trust since its inception in 2010 and before that worked for Stewardship. Although not now involved in the day to day management of its church buildings, he has knowledge of these and the occupying churches. He leads the expanding team and is regularly meeting trustees and elders of independent churches, who are considering how Church Growth Trust can help them with their properties. He works with other sister organisations on a national basis, including with church planting work and revitalisation of churches. He also specialises in advice on church and charity buildings, such as advice on leases and help with unravelling Trust Deeds. He has led a local independent evangelical fellowship and is involved in leading, preaching, training, mentoring and discipling in his current church.