Viengrat works at the Faculty of Political Science, Chulalongkorn University, Thailand, as an associate professor. Since she started teaching at Chulalongkorn University in 2001, many classes have been supervised by her; State-Society, Local Government and Politics, Thai Politics, Japanese Politics are among them. For her experience, she has been invited as the visiting research fellow at the Center for Southeast Asian Studies (CSEAS) and the Graduate School of Asian and African Areas Studies (ASAFAS), Kyoto University in 2009 and 2013 respectively.

Viengrat has several research works on clientelism, local politics, Thai politics and she , authored 2 books (in Thai), “Tun Chiang Mai” [Chiang Mai Capital] in 2006 and “Heepbat kab Boonkoon” [Ballots and Gratitude: Dynamics of Electoral Politics and Its Impacts to the Patronage System] in 2015. Recently, she also conducts researches on clientelism and provincial politics in Thailand to examine the function the state operated under an authoritarian regime in the past 7 years.