The long night of long knives (or the long night of ship exiting, depending on your point of view) continues at Zynga.

The latest person to find paid employment elsewhere is Brian Kahrs.

Previously the lead on production teams for Treasure Isle and Farmville Express, Kahrs has joined SGN as vice president of product.

"As a veteran developer for both the social and mobile platforms, as well as a seasoned team manager, Brian will play a critical role ensuring our games continue to exceed the expectations of an increasingly critical audience," said Joshua Yguado, SGN's head of game development and operations.

Bigger plans

Based in LA, with its main development studio in Buenos Aires, SGN was created by the merger of MindJolt with SGN.

Headed by MySpace co-founder Chris DeWolfe, it boasts over 200 million installs and downloads across Facebook, iOS and Android.