Since the Polecats were first formed back in 1971, the club has been one of the most successful in Tertiary League history.
With 16 First Grade, 6 Second Grade and 6 Third Grade Premierships, the Polecats have taken home more silverwear within the Tertiary League than any other club.
The Polecats have appeared in over 50 Grand Finals as a club.
| Year | First Grade | Second Grade | Third Grade |
| 1971 | |||
| 1972 | |||
| 1973 | |||
| 1974 | |||
| 1975 | Premiers C.C.E vs. Sydney University 22 – 11 | Semi Finalist C.C.E vs. NSW University 11 – 20 | |
| 1976 | Premiers | ||
| 1977 | |||
| 1978 | |||
| 1979 | |||
| 1980 | |||
| 1981 | Premiers | ||
| 1982 | Runners Up C.C.E.S vs. State Rail | ||
| 1983 | Premiers C.C.E.S vs. Macquarie Uni 22 – 8 | ||
| 1984 | Runners Up C.C.E.S vs. Macquarie Uni 14 – 17
| Premiers C.C.E.S vs. RAAF 16 – 11   | |
| 1985 | Premiers C.C.E.S vs. Wollongong Uni 22 – 12  | ||
| 1986 | Premiers C.C.E.S vs. Macquarie Uni 20 – 0  | ||
| 1987 | Premiers C.C.E.S vs. Macquarei Uni 36 – 22 | Final C.C.E.S vs. Nepean C.A.E 12 – 14 | |
| 1988 | Runners Up C.C.E.S vs. Macquarie Uni 0 – 4  | Runners Up C.C.E.S vs. Macquarie Uni 8 – 21  | Premiers C.C.E.S vs. S.R.A 8 – 6 |
| 1989 | Premiers C.C.E.S vs. Hornsby 14 -13  | Premiers C.C.E.S vs. Uni of NSW 17 – 6  | Runners Up C.C.E.S vs. Sydney Uni 4 – 18  |
| 1990 | Runners Up C.C.E.S vs. Uni of NSW 16 -38  | Runners Up C.C.E.S vs. Macquarie Uni 14 – 18  | Premiers C.C.E.S vs. SRA 30 – 0  |
| 1991 | Runners Up C.C.E.S vs. Uni of NSW | Premiers | |
| 1992 | Premiers A.C.U vs. Cumberland 20 – 19  | ||
| 1993 | Premiers | Runners Up A.C.U vs. Uni of NSW | |
| 1994 | Premiers A.C.U vs. Uni of NSW 10 – 6  | Premiers A.C.U vs. Mitchell Old Boys 12 – 10  | |
| 1995 | Runners Up A.C.U vs. UTS | Semi Final Series | |
| 1996 | Premiers sA.C.U vs. Cumberland 46 – 10 | Premiers A.C.U vs. UTS 23 -20  | |
| 1997 | Runners Up A.C.U vs. UTS | Premiers | |
| 1998 | Semi Final Series | ||
| 1999 | Premiers A.C.U vs. Canberra Uni 16 – 12  | Runners Up A.C.U vs. UTS | |
| 2000 | Runners Up A.C.U vs. Sydney Uni | Runners Up A.C.U vs. State Rail | |
| 2001 | Runners Up Nirimba vs. UTS | Premiers | |
| 2002 | Runners Up Nirimba vs. Sydney Uni | Premiers | |
| 2003 | Premiers Nirimba vs. UTS 31 – 30  | ||
| 2004 | Runners Up Nirimba vs. UTS | ||
| 2005 | Premiers Nirimba vs. UWS Macarthur 32 – 10  | ||
| 2006 | Semi Final Series | Runners Up Nirimba vs. Macquarie 14 – 24  | |
| 2007 | Runners Up Nirimba vs. UTS 30 – 40  | ||
| 2008 | Premiers Norwest vs. West Sydney Blues 14 – 12  | Minor Semi Final Norwest vs. Cumberland 12 – 18 | |
| 2009 | |||
| 2010 | Runners Up Norwest vs. West Sydney Blues 18 – 19  | ||
| 2011 | Runners Up Norwest vs. Lewisham Old Boys 20 – 22  | ||
| 2012 | Premiers Norwest vs. UTS Tigers 20 – 16  | Runners Up Norwest vs. UTS Tigers 18 – 24  | |
| 2013 | |||
| 2014 | |||
| 2015 | Premiers Norwest vs. UTS Tigers 20 – 16 | ||
| 2016 | Runners Up TAFE WSI Polecats vs. UTS Tigers 16 – 24  | Runners Up TAFE WSI Polecats vs. UC Grizzlies 14 – 38  | |
| 2017 | Premiers TAFE NSW Polecats vs. UTS Tigers 24 – 16 | Runner Up TAFE NSW Polecats vs. UTS Tigers 22 – 28 | |
| 2018 | Runners Up Macquarie Uni vs. TAFE NSW Polecats 16 – 26  | ||
| 2019 | Premiers TAFE NSW Polecats vs. UTS Wanderers 26 – 8  | ||
| 2020 | Runners Up UTS Wanderers vs. TAFE NSW Polecats 46 – 18  |
