Dear MrMy name is FERROUM Mohamed Amine, 39 years...

We did extensive research to find the most relevant job vacancies to your field. I am pleased to inform you that we found multiple job opportunities that match. We selected several job websites which have the most relevant job vacancies to the position you're seeking. You will find links to those websites below. Please click on each to view the available job vacancies. You can apply to any job you like on those websites. 
Relevant Job Vacancies:

Piping jobs in Qatar- bayt
Piping jobs in Qatar- oilandgasjobsearch
Piping jobs in Qatar- bebee
Piping jobs in Qatar- jobrapido
Some of the job vacancies on the websites above require you to submit your CV to those jobs, so the recruiters can review them. You can also Email the recruiter of each job directly in most cases, which we recommend you do and attach your CV in your emails to them. 
Other Jobs websites to consider:
I also recommend you create an account on all the following jobs websites, and upload your CV: Akhtaboot.com, Linkedin.com, Monster.com, Wzayef.net
Once you create an account and upload your CV on the above (or other) jobs websites, please send us your profile URL/link so we can help you improve your online resume. Our team has a lot of experience in creating professional CVs - so you can attract more attention from companies hiring in your field.
Below, we've compiled some information about the market you're interested in getting a job in, such as average income and cost of living. We hope this helps guide your job search in the choice of location as well.
* The Average Income in Qatar
The average income in certain companies, mainly depends on the concerned company's needs for a specific job/speciality, as it also depends on the skills, level of expertise, educational levels and the professional certificates, diplomas and endorsements of the individual. Here are the most important factors that mainly affect setting the average income in the gulf countries:

Average income in Qatar- QatarOnline for income inquieries

*Cost of living in Qatar
Concerning the cost of living, and the average renting expenses, it is certain that various factors are involved as life, work, and entertainment privileges differ from one place to another. Therefore, you will find attached hereunder the most important links to renting and housing"approximate" prices and expenses in the gulf countries:

Cost of living in Qatar- expatistan for housing inquieries