Twitter: 100% from our next CEO

It seems obvious, but Twitter’s board of directors isn’t interested in chief executive candidates who can’t give 100% to the San Francisco microblogging service.

The board is searching for a new Twitter CEO and announced Monday it will consider only candidates “in a position to make a fulltime commitment to Twitter.”

That clarifies, somewhat, the role of Jack Dorsey, a Twitter co- founder whom the board brought in from another company to serve as interim chief executive after former stand- up comedian Dick Costolo left that position two weeks ago.

Dorsey runs another start- up, payment processing company Square, and speculators wondered whether he might be picked to run Twitter, too. Now it looks as though it will be one or the other.

Only insiders know whether Dorsey is a serious candidate for the Twitter job. Board member Peter Currie, who heads the Twitter search committee, was quoted in the announcement as saying the board has “utmost confidence” in Dorsey’s “ability to lead the company on an interim basis while we identify a permanent CEO.”

Last week, Dorsey said in a statement that “I’m Square CEO, and that won’t change.”