In 1985 Renton was appointed Principal Conductor of the Royal Artillery Orchestra in London, then in 1988 accepted the dual appointment of Principal Director of Music for the Army and Director of the Royal Military School of Music at Kneller Hall in the rank of Lt. Colonel, the youngest person ever to hold the dual appointments. In 1988, he also became Principal Conductor of the British Concert Orchestra, and began to guest conduct all over the world. Through the series of Royal Concerts in London he conducted the London Philharmonic Orchestra, the Halle Orchestra, the Orchestra of English National Opera and the Scottish National orchestra. and was awarded the Freedom of the City of London in 1986 He is also a member of the Worshipful Company of Musicians.
In 1993 as a direct result of the celebration of the Centenary of the Leeds City Charter and after a concert in Leeds Town Hall in which some 250 local wind players took part Frank Renton co-founded and initially conducted the Yorkshire Wind Orchestra. This large wind ensemble of woodwind, brass and percussionists, is a community based ensemble.
In 2009 and 2010, he won with the 'Brass Band du Nord Pas-de-Calais' the French Brass Band Championship.