EEI 2017 Form 10-K

Exhibit 21.5 Subsidiaries of Ecology and Environment, Inc. (the “Company”) as of July 31, 2017 Percentage of Subsidiary Capital Stock Owned by the Company 1. Ecology & Environment Engineering, Inc. (a Colorado corporation) 100% 2. Gestión Ambiental Consultores S.A. (a corporation formed under the laws of Chile) 55.1% 3. ecology and environment do brasil Ltda. (a limited liability partnership formed under the laws of Brazil) 72% 4. Walsh Environmental, LLC (a limited liability company formed under the laws of Colorado) 100% 5. Gustavson Associates, LLC (a limited liability company formed under the laws of Colorado) 83.6% (*) 6. Lowham-Walsh Engineering & Environment Services, LLC (a limited liability company formed under the laws of Wyoming) 80.56% (*) 7. Walsh Peru, S.A. Ingenieros y Cientificos Consultores (a corporation formed under the laws of Peru) 74.78% (*) 8. Servicios Ambientales Walsh, S.A. (a corporation formed under the laws of Ecuador) 51% (*) 9. Tianjin Green Engineering Company (a limited liability company formed under the laws of the People's Republic of China) 50% 10. Consortium of International Consultants, LLC (a limited liability company formed under the laws of Delaware) 98% 11. E & E Consulting, Inc. (formed under the laws of British Columbia, Canada) 100% 12. Ecology and Environment de Mexico, S.A. de C.V. (a corporation formed under the laws of Mexico) 99.998% 13. Ecology & Environment of Saudi Arabia Co. Ltd. (a limited liability company formed under the laws of Saudi Arabia) 66 2/3% (*) Listed percentage owned by Walsh Environmental, LLC.