He recorded with KC & the Sunshine Band, Bobby Caldwell, Latimore, George & Gwen McCrae, Clarence Reid, Timmy Thomas and Betty Wright.

He played guitar with KC & the Sunshine Band and Wayne Cochran during the late 1970s before moving to the West Coast.

In 2016 Slick formed the Airplane Family including Joli Valenti (son of Dino Valenti, Quick Silver Gold), Michael Falzarano (Hot Tuna, New Riders of the Purple Sage), Prairie Prince (co-founder of the Tubes, Todd Rundgren, Jefferson Starship), Peter Kaukonen (Jefferson Airplane, Jefferson Starship, Hot Tuna), Darby Slick (The Great Society, Composer of Somebody to Love), Darby Gould Venegas (Jefferson Starship).

As of 2022 his son Mark Aguilar has joined The Airplane Family as well as separate projects the two of them collaborate on.

Also formed in 2016 the Live/Dead69 Band with the original keyboard player from the Grateful Dead in 1967-70 Tom Constanten, Mark Karan (Rat Dog, Dave Mason, Furthur, Phil and Friends), Robin Sylvester (Rat Dog, Marty Balin Band), Prairie Prince or Joe Chirco (Zen Tricksters).