New York: A top-level Indian American executive has quit micro-blogging site Twitter to pursue some exciting new projects, the latest in a string of high-profile departures.

The exit of Rishi Garg, Twitter's head of mergers and acquisitions, comes weeks after Twitter said it is replacing its CEO, Dick Costolo, with co-founder Jack Dorsey as an interim CEO, a media outlet reported.

"After an amazing ride as Twitter's VP Corporate Development and Strategy, I'm saying farewell today (Saturday)," Garg tweeted.

"I am off to pursue some exciting new projects; more soon! #staytuned," Garg added.

He joined Twitter in May 2014, from the firm Square, where he was head of corporate development.

Before that, Garg was an entrepreneur with General Catalyst Partners, Google and MTV Networks.

"Our team has built a stronger Twitter with a dozen acquisitions in the last year including @periscopeco,@zipdial,@tellapart, @joinniche," Garg's post read.

"It's been a privilege to bring incredible entrepreneurs into the #flock like @kayvz, @crazyfoo, @valwagoner, @jeffma, @dlach5, @gabor."

"I can't wait to witness the company's next chapter under @jack, a truly gifted leader and human being," he added.

In latest developments, Twitter said it is looking for a CEO with a "full-time commitment" to run the service.

The board has formed a search committee and hired executive search firm Spencer Stuart, to find outgoing CEO Costolo's replacement.

The board said it will be looking at candidates both inside and outside of Twitter, and would take the time necessary to find the right person, CNET reported.

With Twitter chairman and co-founder, Dorsey taking the reins as interim CEO on July 1, there is speculation that he could make the job title permanent.(IANS)