Dr. Nani Indrajani Tjitrakusuma has served as a faculty member at Petra Christian University since 1984. She specializes in a wide array of subjects, including Grammar, Language Teaching and Learning, Language Curriculum Design, Material Development, and proficiency-based courses such as English Proficiency Test and TOEFL Preparation.

In 2006, Dr. Nani obtained a CELTA (Certificate in English Language Teaching to Adults) from the Australian Training Center in Sydney, Australia.

She has also received numerous grants from the Ministry of Research, Technology, and Higher Education (Kemenristek Dikti), including a Sandwich Doctoral Abroad Scholarship at Leiden University and grants for postgraduate studies, dissertation research, and fundamental research projects.