IT employment company that depend a lot on H-1B visa personnel to deliver their services say they are at present in a fight for survival due to novel rules created by the U.S Citizenship and Immigration Services (USCIS).

Three IT employment corporations, which hire H-1B personnel as software engineers, developers and analysts, have attached with Tech Serve Alliance, an Alexandria, Va.-based IT services industry friendship, to file a court case challenging a USCIS memo launched early this year which needs that corporations preserve straight control of staff assigned to third party work sites.

The necessities of memo are opposed to business model of employment corporations, which might not essentially be able to maintain daily mistake of a provisional worker's assignments.

Critics say the USCIS action is a straight result of pressure from some in Congress to edge utilize of H-1B visas.

Visa staff creates up as much as 90% of workers assigned by employment firms concerned in the court case, filed in federal court here.

The court case speak USCIS actions might cost IT employment industry some $100 million in company yearly.