Ruth teaches business finance, personal finance, corporate finance and financial markets. She received the Faculty Outstanding Educator Award in 2003, and Recognition for Excellence as Outstanding Educator in 2004. She was also listed as an excellent teacher in The NUS Undergraduate Student Feedback 2002/2003.
She is currently serving on the Board of Management of the NUS Academic Staff Provident Fund. In 2002, she held the post of Vice Dean of Finance and Administration in the School. She also does consulting and conducts in-house training programmes with various multinational organisations.
Her research interests include privatisation and policy risk, mergers and acquisitions and seasoned equity offerings. Ruth's research articles have been published in numerous international academic and professional journals. She frequently serves as a reviewer for international journals and was the associate editor of the Asian Case Research Journal from 1997 to 2003.