Yes, Sinclair has four different organizations that use Greek letters as names. These other organizations honor students in specific areas, as opposed to Phi Theta Kappa's recognition of students' overall academic achievement. In addition to Phi Theta Kappa, Sinclair has chapters of the following societies:

• Kappa Beta Delta - the International Honor society for Business majors. Sinclair's chapter is Alpha Pi and it's advisors are Rocky Belcher, Dennis Brode, Donna Chadwick, Sarah Gross and Ryan Murphy.
• Sigma Alpha Pi - the National Society of Leadership and Success. Their office is located in Building 8, room 025.