deverell became director equipment capability (ground manoeuvre) from april 2007 and was made director general logistics support and equipment at hq land forces in december 2008. he became chief of materiel (land) and quartermaster general from may 2012. appointed knight commander of the order of the bath (kcb) in the 2015 new year honours, deverell was promoted to general on 5 april 2016 on appointment as commander of joint forces command. he was appointed as an aide-de-camp from the same date. he retired in may 2019.