This research pioneered the investigation of the role of doctoral students' thinking styles in their program satisfaction and perceived intellectual competence. Participants were 285 STEM (science, technology, engineering, mathematics) students in Hong Kong. Results showed that students' thinking styles as measured by the Thinking Styles Inventory--Revised II (Sternberg, Wagner, & Zhang, 2007) statistically significantly predicted their program satisfaction and perceived intellectual competence as assessed by two of the scales in the newly constructed Graduate Student Survey (Shin et al., 2015)--beyond their gender, program year, and academic discipline. Findings have brought new insights into the assessment of doctoral students' program satisfaction and perceived intellectual competence. At the same time, findings have contributed to the literature on intellectual styles and that on doctoral education in STEM fields. Practical implications of the findings are proposed for STEM doctoral students in understanding their own ways of thinking and program experiences and outcomes, as well as for academics and senior managers in their efforts to enhance students' access to positive program experiences and outcomes.