OSU relies in some cases on outside professional consulting firms to assist or manage energy audits of campus buildings. The list below includes recent audits. As older audits with relevance are made electronic, they will be posted here.
| Building | Consultant | Date |
| Peavy and Richardson Halls | PAE Consulting Engineers | April 2012 |
| Kerr Administration | Interface Engineering | March 2012 |
| CH2MHill Alumni Center Audit and Implementation Review | Glumac | August 2011 |