Mr. Quilter joined ESDU in 1995 as an engineer working on the Stress and Strength Series. In 1997, the year ESDU was acquired by IHS Markit, he became head of the ESDU Strength Analysis Group with responsibility for the Aerospace Structures, Composites, Fatigue - Endurance Data, Fatigue - Fracture Mechanics and Stress and Strength Series and for the Metallic Materials Data Handbook (MMDH), though his technical work focused on aircraft structures, with emphasis on instability analysis. In 2008 he became Technical Director of the ESDU Aerospace products. He has BA (Hons) and MA (Hons) degrees from the University of Cambridge.