Jean-Philippe Maheu, vice president of global client solutions; chief consumer officer Sarah Personette; and Dalana Brand, chief of people and diversity, are also leaving the micro-blogging platform.
In the meanwhile, there have been no discussions over overtime pay, comp time or job security with the employees
Musk, who acquired the company for $44 billion last week, is moving swiftly to thin the executive ranks as he looks to reshape the company to conform with his own vision.
Power to the people! Blue for USD 8 per month, he tweeted adding that the price is adjusted by country proportionate to purchasing power parity.
It confirms that instead of joining Twitter's board of directors, Elon Musk is now their sole replacement
Krishnan, who is also a former Twitter employee, is expected to guide Musk in his ambitious plan to monetise the social media giant
Krishnan is a general partner at Silicon Valley venture capital firm Andreessen Horowitz (a16z)
Elon Musk has reportedly given an ultimatum to the employees to roll out monthly subscription pack for Twitter Blue by November 7
Twitter's top execs, including Parag Agrawal and Vijaya Gadde will be entitled to "golden parachute" payouts worth more than $122 mn after being fired by the company's new owner, Elon Musk
It's not clear who will ultimately take over but Musk has turned to old friends for advice in the first few days of his Twitter ownership
Musk, who has dissolved the Twitter board, had earlier tweeted that "My title is Chief Twit right there in the bio. No idea who the CEO is"
Tesla CEO Elon Musk, who recently acquired Twitter, on Monday took to the micro-blogging site and addressed the question whether Donald Trump will be permitted back on the social media platform
Most people who work in Twitter's Trust and Safety organization are currently unable to alter or penalize accounts that break rules around misleading information, offensive posts and hate speech
Within hours of the attack on Paul Pelosi, conspiracy theories deflecting blame for the assault on the husband of US Speaker Nancy Pelosi were already swirling online
According to a report from The Verge, he has asked employees to change Twitter Blue, a monthly subscription service costing $4.99 to a much more expensive new subscription
"Now that the word is out: I'm helping out @elonmusk with Twitter temporarily with some other great people," Krishnan said in a tweet
Dogecoin's rally brings focus back on cryptocurrency regulations and decentralised finance networks
According to The Verge, Musk requested that the Explore page which displays trending tweets and news stories, be redirected to the logged-out users visiting Twitter.com.
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Users would have to subscribe to Twitter Blue at $4.99 a month or lose their "verified" badges if the project moves forward, according to the report.