Shangeetha Rajah Kumaran is a Senior Lecturer and the current Head of the Department of English Language in the Faculty of Languages and Linguistics at Universiti Malaya (UM), a position she has held at various times since 2021. She is also the Universiti Malaya Quality Excellence Index (UMQEI) assessor and the University's Programme Quality Assurance Expert (ProQAE), working collaboratively to enhance academic programmes, and improve standardisation and quality of documentation for accreditations. Due to her expertise in programme quality assurance, she has served as the Chair and External Panel of Assessor for the Full Accreditation of several programmes in various institutions.

Her primary research interests focus on sociolinguistics and postcolonial literature, particularly, the sociolinguistic aspects of language use in literary texts, code-switching in various fields, language maintenance and shift among diasporic communities, and Malaysian Indian writings in English. Her current research work centres on translanguaging practices in the education and medical fields, as well as the visibility of languages in public spaces (linguistic landscape). She has authored and co-authored numerous articles and a book titled Diasporic Consciousness of Malaysian Indian Writings in English. She is also the recipient of the 2025 Fundamental Research Grant Scheme (FRGS).