EXHIBIT 21.1 SUBSIDIARIES OF REGISTRANT ENGlobal Corporate Incorporated in the State Services, Inc. of Texas IDS Engineering, Inc. dba ENGlobal Engineering, Incorporated in the State Inc. of Texas Thermaire, Inc. dba Incorporated in the State Thermal Corp. of Texas ENGlobal Constant Power, Incorporated in the State Inc. of Texas ENGlobal Engineering, Inc. Incorporated in the State of Texas ENGlobal Systems, Inc. Incorporated in the State of Texas ENGlobal Construction Incorporated in the State Resources, Inc. of Texas RPM Engineering, Inc. dba ENGlobal Engineering, Incorporated in the State Inc. of Louisiana ENGlobal Technologies, Incorporated in the State Inc. of Texas IDS Engineering Organized in the State of Management LC Texas Petrocon Engineering of Incorporated in the State Louisiana of Louisiana Petrocon FSC, Ltd. Incorporated in the Virgin Islands of the U.S. 1