STATS, the independent consultancy practice in St Albans, Hertfordshire, has announced the appointment of three new directors - Andrew Grafton, Jonathan Clark and Jason Hodgkiss - and a new associate director in Dr George Tuckwell. The appointments are part of STATS\' plans to develop their specialist engineering, materials and environmental consultancy practice in the face of strong demand for their services. Andrew Grafton\'s appointment strengthens the materials and structures skills group, where his responsibilities will include leading the expansion of services in the buildings sector. Jon Clark\'s appointment in the ground and environment skills group will lead the expansion of contaminated land assessment and remediation services. Jason Hodgkiss will take over responsibility for services in the asbestos and water management sector.