hi there... here its one company in doha...

interior design company established in doha since 2005.
specialised in creating the design concept on 3 dimension for villas, houses, showroom, leisure clubs and companies.
we provide you the best and the latest in the interior design field.

Contact Info

Contact: Address:
Amin Khabbaz salwa road

Tel: Fax:
00974 5512945 00974 4689913

City: Visits:
doha 503

Email: Website:
[email protected] www.libanodesign.com.qa

another good company is Arteligno designers.. thay have big projects here..here are the details..

ARTELIGNO INTERIOR DESIGNERS
Po Box 9017
Doha
Qatar
Telephone:
+974 4361580

another site page that you can check all the construction companies in qatar and search which are for interior design as well..
http://www.indexuae.com/qatar/qatarcat.php?keytext=Construction
also google!!!!!! this where i found them...

good luck..