This study aims to investigate the perceptions of engineers and engineering lecturers on their mathematical experiences in the development of thinking skills and the mathematical concepts, mathematical skills and thinking skills that they use in the work place. The sample of the study consists of 23 engineers and 28 engineering lecturers in various fields. For data collection this study used surveys for engineers and engineering lecturers comprised of a multiple choice and open ended questionnaire and also interviews with respondents from both groups. Results reveal that there is no consistency between engineers' and lecturers' perceptions about the mathematical concepts, mathematical skills and thinking skills that engineers use in the workplace.