Sunita Mathur Narain has worked as a Hindi language editor and instructor at many prestigious language institutes including the US Department of State Foreign Service Institute, National Foreign Language Center, and the University of Maryland. Madhumita Mehrotra has taught English and Hindi for 21 years, including at the US Department of State Foreign Service Institute and at the University of California Santa Cruz. She is a Certified OPI (oral proficiency) tester and works as a target language expert and Hindi audio reviewer for various education and test development companies.