Johnston’s role in WWE was providing the soundtrack for WWE programming, in addition to providing musical content for WWE's large output of video games, website content and entrance themes for WWE wrestlers. Johnston achieved fame for producing many of the most memorable entrance theme songs, including the those of The Undertaker, The Rock, Stone Cold Steve Austin, Mr. McMahon amongst hundreds of others, many of which have been released on commercial albums and through iTunes. In 2014, CFO$ took over responsibility for creating entrance themes and musical content for WWE's television output. This was done at the request of WWE Music Group GM Neil Lawi, who wanted to utilize the existing working relationship he had with John Alicastro and Michael Lauri. This meant a forced reduction in Johnston's input into creating new entrance themes starting from that date.