Brett Seyler joins from Torque engine developer InstantAction (formerly GarageGames) and Steffen Toksvig comes to Unity Technologies from ‘Hitman’ developer IO Interactive. Each brings a wealth of experience and expertise to the rapidly growing worldwide team that also recently announced former Criterion man Graham Dunnett to lead its UK studio.

Brett and Steffen join the team cited by Gamasutra as ‘A major player in the market’ and ‘One of the Top 5 Game Companies of 2009’ (alongside long established giants including Apple and Valve).

“Unity Technologies has shown impressive foresight by investing early in technology for both browser and mobile games, which are now the most exciting segments in the industry," said Brett Seyler, VP of Strategy at Unity Technologies. "The team here not only has great ideas, but a proven capacity to execute, so I think it's fair to expect big things in the future."

Steffen Toksvig, Development Director at Unity Technologies, added, “Unity Technologies is probably the most exciting place in the industry to be. What the team has achieved so far is fantastic and it does not stop here.”

“I’m incredibly happy to have Brett and Steffen on board," said David Helgason, CEO of Unity Technologies. "This 'pair of aces' is going to really strengthen our hand as we grow Unity Technologies into the no.1 platform for interactive content developers.”

Unity Technologies is the provider of the Unity development platform for Web, PC, Mac, Wii and iPhone.