Mr. Roscrow joined the National Health Service in 1978 and worked for the Mid Glamorgan Health Authority Supplies Department, later moving to WHTSO (which became the Welsh Health Common Services Authority).
In 1980, he joined the North West Regional Health Authority as a purchaser at Trafford Park Hospital. Following a move back to Wales as Head of Purchasing in East Dyfed Health Authority, he returned to WHCSA as Director of Materials Management with the creation of the Procurement Group in Wales. Since 1996, he served as Director of Welsh Health Supplies following the market testing of the Contracting and Supply Chain services. He serves as Member of Customer Board at DHL Supply Chain Limited.
In 2012, Mr. Roscrow was honoured for a lifetime of outstanding achievement at the National Government Opportunities (GO) Excellence in Public Procurement Awards. He was recognised for his part in driving forward public procurement and making a real difference within the profession over an extended period of time and in 2017 he was awarded with a MBE.