Damien Viel made no mention of the specifics of his leaving.
Elon Musk has advised staff to think about their desire to remain.
During latest round of mass layoffs, Twitter reduced workforce by 50%.

Damien Viel, the president of Twitter's French operations, announced he was leaving the social media network after Elon Musk, the company's new owner, recently ousted top executives and imposed drastic employee cuts. 

In a different message to Reuters, Viel stated that he was quitting Twitter. He declined to reveal how many workers Twitter employed in France before or after Musk's takeover of the business last month, nor did he go into detail about the reasons for his resignation.

French labour regulations prohibit employers from abruptly firing long-term employees. Companies with a presence in France are required to formally notify employees of their intentions to terminate them in advance, generally through the use of a letter with a receipt acknowledgement.

Depending on the circumstances of the dismissal and the level of seniority of the personnel, they must also adhere to specific notification requirements. Companies must also follow specific procedures, which include notifying staff, staff representatives, and the ministry of labor, for terminations affecting multiple employees within 30 days. This indicates that the entire process can take several weeks or even several months.

Since Musk's takeover in October, communications requesting a statement from a Twitter representative in France have gone unanswered.  He advised staff to decide whether they wanted to accept a three-month pay severance package or continue 'working long hours at high intensity.' Elon Musk, the CEO of Twitter, reportedly asked managers to authorise remote work for team members at the risk of their jobs.

Musk stated last week in an email to his staff, 'All that is necessary for approval of remote work is for your manager to assume responsibility for making sure you are providing exceptional value. Additionally, it is required that you hold regular face-to-face meetings with your coworkers, ideally once per week but no less frequently than once per month.'

At the risk of stating the obvious, he continued, 'Any manager who fraudulently asserts that someone reporting to them is doing outstanding job or that a specific role is necessary, whether remote or not, will be terminated from the organisation.'