Mark Cook is an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 songwriter and keyboardist, best known for playing keyboard

Keyboard instrument

A keyboard instrument is a musical instrument which is played using a musical keyboard. The most common of these is the piano. Other widely used keyboard instruments include organs of various types as well as other mechanical, electromechanical and electronic instruments...

s in the 1970s rock group Daniel Amos

Daniel Amos

Daniel Amos is a rock band formed in 1974 by Terry Scott Taylor on guitars and vocals, Marty Dieckmeyer on bass guitar, Steve Baxter on guitars and Jerry Chamberlain on lead guitars. Current members include bassist Tim Chandler, guitarist Greg Flesch and drummer Ed McTaggart...

. Mark Cook later left the group to become a Calvary Chapel

Calvary Chapel

Calvary Chapel is an evangelical association of Christian churches with over one thousand congregations worldwide. Calvary Chapel also maintains a number of radio stations around the world and operates many local Calvary Chapel Bible College programs. It presents itself as a "fellowship of...

 Pastor.

Prior to his time with D.A., Cook was the keyboardist for the Warner Brothers band Spring Canyon.

Cook is now working as an English teacher at Battlefield High School in Haymarket, Virginia.