Andrew started his career as a civil engineer designing ports, harbours and river defences. In 1980 he changed to structural engineering and joined Hurst Peirce + Malcolm in 1986 as an Associate becoming a Partner in 1988. He became Senior Partner in 2002.

He has a wide range of experience of most building types be they new construction or refurbishment. In particular he is interested in the refurbishment of old and historic buildings where he likes to enhance the practice's reputation of understanding the original construction so that the alterations are complementary.

He has also undertaken a large number of structural appraisals of buildings of all ages giving considerable insight into the performance of the different types of construction.

Andrew also provides advice on civil engineering matters and in particular flood assessments.

He has acted as an expert witness on a wide variety of legal and insurance cases where a structure has been involved.

He has been accredited by the Conservation Accreditation Register for Engineers (CARE) as a conservation engineer.