Doha-based head of comms Sophie Knight, who joined the company in 2015, has resigned and it is not known if she has a job elsewhere.
A colleague in the Qatari capital, comms manager Michael Johnson, recently left and joined UK consultancy The PC Agency in March. Johnson worked at British Airways until last year.
London-based Europe PR manager Elise Duvergé-Biensan is also leaving a little more than a year after joining, following a long stint at Air France KLM.
Knight was the firm's most senior comms specialist, reporting directly to Salam Shawa, SVP of marketing and corporate comms. The role of VP for comms, a level above Knight's position, has been unfilled since Jenny Dervin's departure in March 2017. Dervin had been with the firm for 18 months.
The airline did not respond to a request for comment.
The remaining team is understood to number circa 20 staff in Qatar and a handful of other employees elsewhere.
Qatar Airways took on doomed agency Bell Pottinger's Engage division for UK PR early last year, around six months before its collapse. Prior to that, it worked for The PC Agency.
It is now understood to be working with the London office of Cohn & Wolfe (now Burson Cohn & Wolfe) on a project basis.
The carrier is also a FIFA Partner, and likely to increase its sponsor visibility ahead of the 2022 World Cup, which takes place in its home market. More immediately, it recently said it would be posting a "very large loss" in its upcoming financial results, putting this down to a regional blockade.
Last year, PRWeek interviewed Shawa's counterpart at rival Etihad, taking in subjects including being a woman in a male dominated industry.