Salam IQ755,

Send an official letter requesting them to issue an NOC letters to apply for family visit visa under your sponsorship and to exempt him from two-year ban (in case your brother was employed less than 2 years). Attached your passport and RP copies; and so his passport and RP cancellatin page copies.

Further, there is no harm if he will be backed here for visit or work or whatever legitimate purpose he intents. It's a basic human right to earn his living or conduct his private legal business. No one can bar you from that so just be honest with his previous employer to avoid a can of worms.

Knowing Technip, I don't think they will hold any issue against your brother for his visit or work again here in Qatar unless your brother has a lingering bad reputation.

Hope the above helps.