Saipan casino operator Imperial Pacific International (IPI) is looking for a new CEO to replace Mark Brown, who abruptly resigned this weekend.

On Tuesday, the Marianas Variety reported that Brown (pictured) had sent the Commonwealth Casino Commission (CCC) an email on Sunday saying he was resigning his role as IPI’s chief executive, effective immediately. CCC exec director Edward Deleon Guerrero said IPI’s search for Brown’s replacement was already underway.

Deleon Guerrero said he wasn’t at liberty to disclose the reason behind Brown’s resignation. Last month, Brown was a no-show at the CCC’s monthly meeting, leading CCC chair Juan Sablan to grumble that the CCC might “need to subpoena” Brown to ensure his attendance.

Brown was IPI’s original CEO but shed the mantle in early 2017 to become IPI’s chairman. One year later, Brown left the company entirely to “pursue other projects close to his family” on the US mainland, only to return in late 2018 as interim chairman and eventually resume the CEO role as well.