Suntipaap Sungprakul, nickname Arjan Poon, is an experienced English lecturer who has been teaching at various education levels in Thailand.

His previous teaching experience prior to joining Thongsook includes teaching English at a public secondary school, serving as an English tutor at a language school, and, most recently, serving as an adjunct lecturer for English classes at the Faculty of Painting, Sculpture, and Graphic Arts (PSG) and the Graduate School, Silpakorn University.

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Apart from education-related work, he also tried his hand at journalism as he joined Voice TV, the leading News Station of the country as the journalist handling the scriptwriting and voice over news scoops for the international news and later, sport news.

He still occasionally gives comments or interviews for the station, particularly on the education-related scoops/ news segment.