Dara Nasr, UK managing director at Twitter, is understood to have left the company after 10 years.
According to reports in Campaign, this is not part of the mass layoffs the social media company implemented when Elon Musk took ownership of the business.
Nasr joined the company in 2012 as head of sales in the UK, and progressed to sales director in 2014 and finally managing director in 2015.
Prior to Twitter he held roles at Google, Eurosport and IDS.