Marek has performed internationally with:

Arno Hecht (The Uptown Horns)

Jon Paris (Johnny Winter/Les Paul Orchestra)

Chuck Mead (Million Dollar Quartet)

Eddie Clendening & The Blue Ribbon Boys

The State Theatre of Georgia (A Closer Walk with Patsy Cline)

Alice Wallace

Salmon Arm Roots & Blues Festival

B.B. King blues club

Million Dollar Quartet

Boogie Stomp (Bob Baldori & Arthur Migliazza)

Rob Stone

Devendra Banhart

Alex Battles

Johnny Kinnaird

Corey Kaiser

Ring of Fire

Misbegotten Cowboys

Gene Casey and the Lone Sharks

Ted Hefko and the Thousandaires

The Melatauns

Ruby Ann

Mike Cobb and the Crevulators

Smokin' Billy Slater

Ethan Lienwand

Joaqin Cotler

Bobby Volkman Trio

Sean Kershaw & the New Jack Ramblers

Johnny Pinhook and the Tobacco-aires

Alan Lee Backer (Bobtown/The Twanglers)

Rana Santacruz

Pinky Swearz

Belacqua 

Grant Zubritsky

Wooden Nickle