Exhibit No. 21 CONSOLIDATED SUBSIDIARIES OF ICF KAISER INTERNATIONAL, INC. JURISDICTION ENTITY NAME OF FORMATION - ------------------------------------------------------------------------------------------------------- I. Clement International Corporation Delaware I. Cygna Group, Inc. Delaware II. Liability Risk Management, Inc. California I. ICF Cannon Associates, Inc. Delaware I. ICF Consulting Associates, Inc. Delaware I. ICF Incorporated Delaware I. ICF Information Technology, Inc. Delaware II. Phase Linear Systems Incorporated Delaware I. ICF Kaiser Development Corporation, Inc. Delaware II. Global Trade & Investment, Inc. Delaware I. ICF Kaiser Engineers Group, Inc. Delaware II. Henry J. Kaiser Company Nevada II. ICF Florida First, Inc. Delaware II. ICF Kaiser Engineers, Inc. Ohio III. ICF Kaiser Engineers (California) Corporation Delaware III. ICF Kaiser Engineers Corporation New York III. ICF Kaiser Engineers of Michigan, Inc. Michigan III. ICF Kaiser International Planning & Design, Inc. Pennsylvania III. ICF Kaiser Mound, LLC (99.9%) Ohio III. ICF Kaiser Remediation Company Delaware III. Kaiser Engineers Australia Pty. Limited (50%) Australia IV. ICF Kaiser Aluterv Hungary IV. ICF Kaiser Cayman Islands, Ltd. (99.9%) Cayman Islands IV. Kaiser Engineers (NZ) Ltd (99%) New Zealand III. Kaiser Engineers and Constructors, Inc. Nevada IV. ICF Pty. Ltd. (50%) Australia IV. Kaiser Engineers Limited (0.02%) U.K. IV. Kaiser Engineers Australia Pty. Limited (50%) Australia IV. Kaiser Engenharia de Portugal Limitada (50%) Portugal V. ICF Kaiser Cayman Islands, Ltd. (0.1%) Cayman Islands IV. Kaiser Engineers (NZ) Ltd (1%) New Zealand IV. Kaiser Engineers Pty. Ltd. (50%) Australia IV. Kaiser Ingenieria de Chile Limitada (51%) Chile III. Kaiser Engineers International, Inc. Nevada IV. ICF Pty. Ltd. (50%) Australia IV. Kaiser Engenharia de Portugal Limitada (50%) Portugal IV. Kaiser Engineers Pty. Ltd. (50%) Australia IV. Kaiser Ingenieria de Chile Limitada (49%) Chile III. Kaiser Engineers Limited (99.98%) U.K. IV. Kaiser Engineers Technical Services Limited (80%) Cyprus IV. Kaiser Engineers (UK) Limited (50%) U.K. -Page 1 of 2- Current as of January 1, 1997 III. Kaiser Engineers (UK) Limited (50%) U.K. IV. Kaiser Engineers Technical Services Limited (20%) Cyprus III. Kaiser Engenharia e Constructoes Limitada Brazil III. KE, Inc. Philippines III. ICF Kaiser Engineers & Builders, Inc. Delaware III. KE Services Corporation Delaware III. La Compagnie Henry J. Kaiser Company (Canada) Ltee. Canada III. ICF Kaiser Overseas Engineering, Inc. Delaware III. PCI Operating Company, Inc. Delaware II. ICF Technology Incorporated Delaware II. International Waste Energy Systems, Inc. Delaware II. KE Livermore, Inc. Delaware I. ICF Kaiser Engineers Massachusetts, Inc. Delaware I. ICF Kaiser/Georgia Wilson, Inc. Delaware I. ICF Kaiser Government Programs, Inc. Delaware II. Kaiser-Hill Company, LLC (50%) Colorado I. ICF Kaiser Hanford Company Delaware I. ICF Kaiser Holdings Unlimited, Inc. Delaware II. American Venture Investments Incorporated Delaware III. American Venture Holdings, Inc. Delaware II. Cygna Consulting Engineers and Project Management, Inc. California II. Excell Development Construction, Inc. Delaware III. International Systems, Inc. Colorado II. ICF Kaiser Engineers Eastern Europe, Inc. Delaware III. ICF Kaiser Netherlands B.V. (10%) Netherlands II. ICF Kaiser Netherlands B.V. (90%) Netherlands II. ICF Leasing Corporation, Inc. Delaware I. ICF Kaiser Mound (Ohio), Inc. Ohio I. ICF Kaiser Mound, LLC (0.1%) Ohio I. ICF Kaiser Panama S.A. Panama I. ICF Kaiser Servicios Ambientales, S.A. de C.V. Mexico I. ICF Kaiser Systems, Inc. Delaware I. ICF Resources Incorporated Delaware II. HBG Hawaii, Inc. Delaware II. HBG International, Inc. Delaware I. Kaiser Engineers Pacific, Inc. Nevada I. Monument Select Insurance Company Vermont I. Systems Applications, Inc. Nevada I. Systems Applications International, Inc. Delaware I. Tudor Engineering Company Delaware -Page 2 of 2- Current as of December 31, 1996