A member of The Buckinghams in the late 1960s, Grebb was also a record producer and an arranger, who worked with musicians including Peter Cetera, Bill Payne, Bonnie Raitt, Eric Clapton, Etta James, and Leon Russell.

His early interest in music can be attributed to his father, Harry, who was a saxophonist and played in the big-band era, both on the road and in the clubs of Chicago.

[4] In 1966, a local band, The Buckinghams, required the services of a keyboardist, and Marty Grebb was asked to team up with them.

The band went on to have three (Billboard) and five (Cashbox) top-ten national selling singles and three top twenty albums with Marty Grebb for Columbia Records.

[4] After the Buckinghams, Grebb toured with a number of artists,[5] including Leon Russell, Elton John, Muddy Waters, and most notably Bonnie Raitt[6] as a member of her band for 25 years.