NEBOSH or OSHA

Assalam alaikom wwb
Dear all
I am interested in getting a certificate in Safety Management area
I am having problem in choosing one of those certificates

OSHA, Nebosh Or Certified Safety Professional

Please hep me in making the right decision by giving me (an everybody in the forum) some information on each of them as much as you know

which one is credited more in middle east?
where can I do the training? which is the best training company?
cost of training and certificate?

etc

May ALLAH reward you for your help
Abu Omar