Ngee Ann Polytechnic (NP) is in the process of firing its senior lecturer Tan Boon Lee.
NP said it made the decision after completing its internal investigations into two incidents.
The polytechnic has charged Tan with a serious breach in its staff Code of Conduct.
"Our staff members are expected to respect cultural, ethnic and religious differences in our society. They must uphold secularity and impartiality at all times," NP in a statement on June 17.
"The disciplinary action meted out against the staff in question reflects our commitment to provide a safe, inclusive and respectful environment for our campus community."
The first incident saw Tan making racist remarks to an interracial couple on Orchard Road.
The second incident stemmed from an Instagram post by NP alumnus Nurul Fatimah Iskandar, who alleged Tan had made Islamophobic comments during lesson time in 2017.
Police investigations into both incidents are ongoing.