Waldo  has played/toured with Suzy Bogguss, Chet Atkins, Clarence “Gatemouth” Brown, Michelle Shocked, O.J. Ekemode and the Nigerian All Stars, The Animal Band (children’s music in costume), Kix Brooks, Pam Tillis, George Marinelli, Danny Flowers, Bo Diddley, Don Henry, Tom Kimmel, Angela Kaset, Mark Collie, Earl Gaines, Charles Walker, Roscoe Shelton, Al Garner, Homesick James, Dan Dowling, Fred James, Mary-Ann Brandon, Little Anthony, The Coasters, and of course many others. In addition to recording with the majority of these artists, in a variety of styles, he’s played on Grammy nominated albums in two categories – Best Contemporary Folk and Best Traditional Blues. He’s played Carnegie Hall and the White House with Chet Atkins, and many of the other prestigious venues in the US (Radio City Music Hall, Boston Symphony Hall, etc.).