Developments in one major corporation's ongoing program to evaluate employees' English language proficiency are discussed. The testing program was developed by the multinational E. I. DuPont de Nemours corporation for use with international employees. The history and rationale for the selection of the five English tests used are outlined, the tests are described, and some sample training recommendations based on test performance are presented. The tests selected include the Test of English as a Foreign Language (TOEFL), Speaking Proficiency English Assessment Kit (SPEAK), a writing sample evaluated according to guidelines for the Test of Written English (TWE), the Preliminary TOEFL, and the Comprehensive English Language Test (CELT). Recommendations for training are based on test scores and focus on improving rapid listening and reading comprehension skills, spoken comprehensibility, and writing abilities. The recommendations are implemented in ongoing training programs in the United States. A brief bibliography is included. (MSE)