Dayn is a multi-award winning Film Editor of commercials, music videos, short films, and feature films. He started as a Cutting Room Runner at the age of 18 at DGW Ltd London. There served a seven year apprenticeship in 35mm Film Editing and officially became a Film Editor at the age of 25.

Dayn has have worked with notable directors such as:
Chris Hartwill, Steve Lowe, Marek Kanievska, Adrian Moat, Jordan Scott, Chris Cunningham, Sean Ellis, Thed Lensen, John Marles, Barry Skolnick, Hugh Johnson, Daniel Levy, Trevor Robinson OBE, Kevin Molony, Henrik Hansen, Tim Saccenti, Martin Wonnacott, Tony Kaye, Thomas Napper, Dawn Shadforth, Pete Bishop, Eva Midgley, Lee Ford and Dan Brooks, Carl Erik Rinsch, Ben and Joe Dempsey, Grace Audrey Kim, Jake Nava, Emile Nava, Matthew Vaughn, Dave Meyers, Tom Ford, Klaus Obermeyer, Johnny Hardstaff, Danny Clinch, TG Herrington, Jacob Rosenberg, Sir Ridley Scott, and Joe Pytka.