This study reported the design and implementation of a 16-week graduate seminar on second language (L2) pragmatics offered for 14 graduate teaching assistants (GTAs) who were teaching various target languages as teachers of record at a US public university. Grounded in the explicit awareness-raising approach, the seminar was designed to increase the GTAs' pragmatic knowledge, promote their cross-cultural pragmatic awareness, and facilitate their teaching and researching of pragmatics. Specifically, the training comprised four modules: key concepts in pragmatics, cross-cultural pragmatics, L2 pragmatics, and instructional pragmatics. With the recent advances in technology, the guidelines and practices for effectively designing web-based pragmatic materials were also incorporated. One of the GTAs, who was a native speaker of Mandarin Chinese and taught the language in the program, was observed as a focal participant to track the development of her pragmatic knowledge and application. Overall, the participants' positive evaluation ratings and comments on the seminar, as well as the focal Chinese GTA's demonstrated knowledge and application in pragmatics over time, suggest that the pragmatics-focused training is beneficial to cultivate the GTAs' professional knowledge and qualities in delivering pragmatics instruction.