Cromwell has worked with multiple prominent artists from various genres, including Neil Young, Mark Knopfler, Joe Walsh, Joss Stone, Bonnie Raitt, and Crosby, Stills, and Nash.

Since then he has recorded and toured with Young on several occasions, and appears on albums such as Freedom (1989), Prairie Wind (2005) Living with War (2006) and Chrome Dreams II (2007).

Cromwell is also known for his contributions to Mark Knopfler's solo albums Golden Heart (1996), Sailing to Philadelphia (2000), The Ragpicker's Dream (2002) and Shangri-La (2004).

[5] He has also worked with many other artists including Dave Stewart, Vince Gill,[6] Amy Grant, Lady Antebellum, Diana Krall, Willie Nelson,[7] Jackson Browne,[8] Boz Scaggs, Wynonna, Trisha Yearwood, Miranda Lambert, Bonnie Raitt,[7] Peter Frampton,[9] Allison Moorer,[10] Chris Knight,[11] Joss Stone,[12] Rodney Crowell, Marty Stuart, and Stevie Nicks.

[14] With Trace Adkins With Lady Antebellum With Katie Armiger With Sweet Pea Atkinson With Joan Baez With The Beach Boys With Drake Bell With Matraca Berg With Michael Bolton With Joe Bonamassa With Danielle Bradbery With Lee Brice With Kix Brooks With Brooks & Dunn With Pieta Brown With Billy Burnette With Shawn Camp With Mary Chapin Carpenter With Paul Carrack With Jeff Carson With Beth Nielsen Chapman With Steven Curtis Chapman With Kenny Chesney With Terri Clark With Mark Collie With John Cowan With Crosby, Stills, Nash & Young With Rodney Crowell With George Ducas With Ronnie Dunn With Radney Foster With Peter Frampton With Vince Gill With William Lee Golden With Amy Grant With Emmylou Harris and Rodney Crowell With Emmylou Harris and Mark Knopfler With Rebecca Lynn Howard With Sonya Isaacs With Jewel With Jamey Johnson With Toby Keith With Charles Kelley With Mark Knopfler With Alison Krauss With Miranda Lambert With Jim Lauderdale With Cyndi Lauper With Kenny Marks With Mac McAnally With Shane McAnally With Pat McLaughlin With Jo Dee Messina With Frankie Miller With John Michael Montgomery With Allison Moorer With Keb' Mo' With Craig Morgan With Willie Nelson With Joe Nichols With Stevie Nicks With Chris Norman With John Oates With Anders Osborne With Jake Owen With Orianthi Panagaris With Lee Roy Parnell With Dolly Parton With Kellie Pickler With Kim Richey With Lionel Richie With LeAnn Rimes With Bob Seger With Blake Shelton With Ashton Shepherd With Jessica Simpson With Joss Stone With Livingston Taylor With Josh Turner With Bonnie Tyler With Roch Voisine With Joe Walsh With Holly Williams With Brian Wilson With Gretchen Wilson With Lee Ann Womack With Chely Wright With Trisha Yearwood With Neil Young With Robin Zander