Waewpen Piemwichai is a counsel in the Tilleke & Gibbins corporate and commercial group, based in the Hanoi office. Waewpen is an expert in the area of international technology, media, and telecommunications (TMT) law. She assists companies from all industry sectors on TMT-related matters such as data privacy, cybersecurity, telecom and IT network services, online streaming and broadcasting, cloud computing, e-commerce, and advertising. Outside the TMT space, Waewpen also has extensive experience and expertise in practice areas including commercial transactions, franchising, company formation, and construction.

Waewpen was named "TMT Rising Star of the Year" at the 2023 Legal 500 Southeast Asia Awards, and has also been named one of Asia's "Top 15 Rising Lawyers" (2021) and "Top 15 TMT Lawyers" (2022 and 2023) by Asian Legal Business.

Waewpen is a member of the Thai Bar Association, and was based in Bangkok before relocating to the firm’s Hanoi office.