Just to add to the information provided by Bingbong, the working visa has to be stamped in your passport, yes by the Qatar Embassy in the Philippines through DHL-Wide Wide World Express, which usually takes 5-7 days before your stamped passport is delivered to the address provided. But DHL - WWW will require you to submit a medical test result from Qatar SCH accredited diagnostic clinic in the Philippines http://www.sch.gov.qa/mchc/En/ponduty.jsp. You can also use the same medical result for you OEC application in POEA.

A copy of contract is also one of the many POEA requirements. Just make sure your employer will be cooperative & supportive enough.

By the way, did you complete the 2 year ban, or your previous employer provided you an NOC?