Christopher John Glen, known simply as Chris Glen, is a Scottish rock musician. He is best known for playing with The Sensational Alex Harvey Band from 1972 to 1977, and The Michael Schenker Group from 1980 to 1984, 2008 to 2010, and 2016 to 2020. He also performed with Michael Schenker Fest, featuring original MSG band members.

Rock Drill is the eighth studio album by The Sensational Alex Harvey Band, which was released in Europe in 1977 and in the UK in 1978. The album includes Tommy Eyre on keyboards; the band's original keyboardist Hugh McKenna was absent due to an internal dispute - however, three songs from the album are co-credited to him. McKenna has since recorded his regrets at the dispute, given what lay ahead in the next five years.