Dr. Guo-Brennan's career in the field of education spans three decades in cross-cultural and international settings. She has developed scholarly and professional expertise in the following areas:
- Teacher Education & Development
- International & Comparative Education
- Global Citizenship Education
- Global Leadership
- Internationalization & Global Engagement
- Curriculum Theory
- Immigration and Integration
- Culturally Responsive Leadership, Curriculum & Pedagogy
- International Development
- Education Change/Reform
- Research Methods (Hermeneutics, Mixed-Methods)