You have a legitimate concern over clothing my friend. I have been here for few years and I come from mixed backgrounds of eastern and western. I worked so far in two major organizations which have distinct dress codes. Generally, business casual (shirt and tie) would be on the safe side.

It is the same as anywhere in the west; it depends on the culture of the organization you working for . Generally, it is relaxed so a shirt with/without a tie would do just fine. Colors don't make much difference and most places have "casual Thursday".

As you will find out, locals (Qatari and non-Qatari) here are big on image so if you wear a tie and a suite you will definitely add more points. Just drop the suit in the summar as it could reach up to 50 degrees – not worth dying for :D

Myself: I never wore a suit in Qatar and I wear a tie many weekdays.

To be on the save side, wear a shirt and a tie until you find out about your organizations culture.

As for wearing traditional clothes, it is no offence whatsoever if wear them. In fact, I would encourage it as Qatari and other Arabs will find it novel and a friendly gesture. Dishdasha is worn for especial occasions such as weddings and Friday prayers and in the winter ... you could skip it. However, wearing the head-gear (ghidra and egal) requires some learning - unless you go for a simple head cover such as Omani.

There are many nationalities in Qatar and many wear their national dress – such Qatari, Pakistanis and Indians. Foreigners get this false image that Qatari people are unapproachable which is not entirely true. They are quit friendly if you smile and say HI. Many people do not learn Arabic which is a shame - so I would advice you to try to learn if you have the chance.

Welcome to Qatar and I hope you enjoy your time here.

Easy