Prior to establishing the firm, he was a litigation partner of Silk Legal, an international law firm based in Bangkok where he was a key member of the firm to drive and generate the new businesses to the firm. Prior to joining Silk Legal, he was the managing partner of Jus Laws & Consult, an independent Bangkok law firm where he was engaged in building a litigation department and firm management.

Pisut was the chief of litigators from 2010–15 at Price Sanond Prabhas & Wynne (formerly known as Deacons), where he handled a substantial amount of major litigation and other forms of alternative dispute resolutions, as well as providing legal advice in various fields to local and international corporations.

Between 2003-10, Pisut was a partner of Rapeepat Public Law Office where he handled many civil and commercial disputes in the Thai courts and arbitration. Before joining Rapeepat Public Law Office, he was an associate of Sak & Associates from 2000-03. He previously interned as a lawyer at Prachuab Seang-Anong Law and Accounting Office.

Notable cases

• Advising a major Thai-Japanese automobile company, a major supplementary foods manufacturer, the biggest dealer of Japanese automobile company in respect of distributorship and disputes on the various termination of distributorship.
• Advising, representing and defending a major Thai-Japanese automobile company in relation to a criminal charge under the Trade Competition Act of Thailand, which was the first major case of its kind in Thailand.
• Representing a leading Malaysia hotel operator in respect of the US$17 million acquisition from Japanese Investors of a 4-star hotel in Koh Samui, Thailand.
• Advising a Thai hotel owner in respect of long-term hotel management agreement with an international hotel chain in a 4-star hotel project in Krabi, Thailand.