Lewis den Hertog is an audio-visual designer and theatre maker based in Glasgow. He has been creating video design for a broad range of theatre productions in Scotland and elsewhere on the globe over the past decade. He is a co-founding member of theatre company Groupwork, creators of the 2019 Fringe First Award-winning play The Afflicted and the highly acclaimed When Prophecy Fails, which premiered at Manipulate Festival 2025 and featured in this year's Edinburgh International Festival programme.

Other recent works include Escaped Alone, directed by Joanna Bowman (Tron Theatre), Wild Rose, directed by John Tiffany (Lyceum/Playful Productions), and The Outrun, directed by Vicky Featherstone (Lyceum/Edinburgh International Festival).