After completing his PhD, Roger was employed between 1987 and 1992 by English Heritage to write up the major excavations at Wroxeter Roman City in Shropshire. On substantial completion of this report, he returned to University of Liverpool to undertake temporary Lecturer posts in Archaeology. In 1994 he successfully applied to be a Leverhulme Research Fellow on the Wroxeter Hinterland Project, a ground-breaking three-year long post-doc research project designed to put the Roman city of Wroxeter into its social and economic landscape context. It involved extensive fieldwalking that required the recruitment of a volunteer database eventually rising to 400 members, and the first full geophysical survey of a Roman town. The results of the project were fully published in 2007 and 2014, and the project itself was successfully nominated by the University in 1999 for the Queens Anniversary Prize for 2000. Following completion of the Wroxeter Hinterland Project, Roger was employed as a Project Manager and Finds Specialist by Birmingham Archaeology.
In 2000 he was appointed Academic Director of Ironbridge Institute, a postgraduate teaching partnership between the University and the award-winning and leading Independent museum, the Ironbridge Gorge Museums Trust. Working from the Coalbrookdale site, the Ironbridge Institute ran programmes in Heritage Management, Industrial Archaeology, Industrial Heritage and Historic Environment Conservation. He was responsible for the design and implementation of Distance Learning programmes in Heritage Management from 2005. In 2012, when Professor Mike Robinson was appointed, the Ironbridge Institute was renamed the Ironbridge International Institute for Cultural Heritage (IIICH) and returned to Birmingham, while retaining its offices on the Coalbrookdale site. Roger continued to hold the post of Academic Director until 2018 when he was reassigned to the Department of Classics, Ancient History and Archaeology.
While employed at Ironbridge Institute he was employed as a consultant by English Heritage to write Conservation plans for Wroxeter Roman City and The Clee Hills in Shropshire, and by the Georgian State Archaeological Service to write a report on the Archaeological components of the World Heritage Site at Msksheta. He was employed by the University of Ljubliana as a tutor on an Archaeological Training Field School at Ljubliana Castle, Slovenia and was a member of an ICOM museums advisory team to Puskinskye Gorye, Russia. From 2007-2012 he was on the Council of the Institute for Archaeologists (now Chartered Institute for Archaeologists), of which he has been a Member since 1987. In 2012 he was elected as a Fellow of the Society of Antiquaries of London, and between 2011-17 he served on the English Heritage (later Historic England) Advisory Committee. From 2017 he has been serving on the English Heritage Trust Research Committee. Between 2010 and 2017 he was Editor of The Historic Environment Policy and Practice, establishing it as a leader in the field of historic environment conservation and overseeing its growth from two issues per annum in its first years to four issues in 2016 onwards.