Veterinary Care:

Government Veterinary Clinic - Qatar +974 465 3083
The Veterinary Surgery, Doha - Qatar http://www.dohavets.com
Qatar Veterinary Centre, Doha - Qatar http://www.qatarvet.name.qa

the government clinic is free!
but the timing is only upto 1 pm. and weehends holiday!
Also i would recommend his nails be clipped at home , cause it is a weekly routine . however there r some dos and donts . i have a domestic long haired kitten too and i clip his nails at home.

for trimming cat nails watch this video:

Cutting your cat's nails can be a little intimidating at first, but with these tips you can do it safely and comfortably at home. Learn how to trim cat nails the right way.
http://www.youtube.com/watch?v=X0AT7IXdugc

only thing is to be careful about not clipping the pink part of the nail. if cut it will bleed , cause pain ,and at times may get infected. so just be careful about that!