Director of Research (if dissertation) or Advisor (if thesis)
- Ordal, George W.
- Ormsbee, Allen I.
- Ornik, Melkior
- O'Rourke, Thomas
- Orta , Andrew
- Orta, Andrew
- Ort, Donald R.
- Ory, John C.
- Osborne, Margery
- O'Shea, Conor
- O’Shea, Conor
- O'Shea, Conor E
- O'Shea, Conor Edward
- Osman, Adam
- Osman, Elizabeth
- Ostler, Teresa
- Ostler, Teresa A.
- Ostoja-Starzewski, Martin
- Ostrosky, Michaelene
- Ostrosky, Michaelene M
- Ostrosky, Michaelene M.
- Oswald, Ramona F
- Oswald, Ramona F.
- Oswald, Ramona Faith
- Otnes, Cele C
- Otnes, Cornelia C.
- Ousterhout, Robert
- Ouyang, Yanfeng
- Overbye, Thomas
- Overbye, Thomas J.
- Overby, Thomas J.
- Ozer, Hasan
- Ozkan, Sebnem