Underground Films & Management partners Nick Osborne and Trevor Engelson have decided to part ways after a decade of working together.

The duo made the announcement Monday, indicating the split was amicable. Engelson will continue to run Underground as a management and production company, and Osborne will form an as-yet-unnamed production company while focusing on writing.

“Over the last three years I have been working on a novel, ‘Refuge,’ and now that’s it’s almost finished I realized that I wanted to focus on writing even more while continuing with my other great passion, producing,” Osborne said. “In such a scenario being a partner of a management-production company did not make sense.”

“I started off as Nick’s assistant 10 years ago and we’ve been able to build this really special company together over the years,” Engelson said. “I may be losing a great business partner by Nick transitioning into being a writer, but he’s my client now, so I’ll be working for him all over again!”

Osborne and Engelson will continue to work on studio projects they have developed and set up together over the years under the Underground banner on the production side of the company. The duo produced “Remember Me” at Summit and “License to Wed” at Warner Bros.

Josh McGuire and Evan Silverberg are remaining as part of the Underground team of managers. Underground clients include Jon Lajoie, Jim Field Smith, Patrick Melton & Marcus Dunstan, Chip Hall, Andrew Goldberg, Matthew Moy, Hageman Brothers, Jason Micallef, Joel David Moore, Dito Montiel, Holland Roden, Doug Goldstein, Sharni Vinson, Austin Winsberg, Seamus Kevin Fahey, Scott Zabielski, Daniel Stamm and Irvine Welsh.