Crystal Lake South High School Alumni
Crystal Lake, Illinois (IL)
Derek Duffy
Crystal Lake South High School
Class of 1990
→ Join 2662 Alumni from Crystal Lake South High School that have already claimed their alumni profiles.
→ There are 58 classes, starting with the class of 1943 all the way up to class of 2023.
DEREK'S PROFILE
| First Name | Derek |
| Last Name | Duffy |
| Graduation Year | Class of 1990 |
| Gender | Male |
| City | N/A |
| State/Province | FL |
| Country | United States |
| Occupation | Substation Electrician |
| Married | Yes |
| Favorite School Memory | There are so many... but the one that stands out the most is meeting the love of my life Kelly O' Brien |
| About Me | Moved to Florida in 1992, married Kelly O'Brien in 1995. We had our son in 2002 who I cherish everyday. |
Class of 1990 Alumni
→ Reunite with 49 class of 1990 alumni that have joined.
Jeff Nolin
Class of 1980
James Overlin
Class of 1993
Alyssa Rochford
Class of 2007
Chris Kelly
Class of 1986
Jason Roos
Class of 1994
Hiep Le
Class of 1996
Corrine Kaczmarek
Class of 1983
Barb Wruck
Class of 1982
Anna Gilgien
Class of 2005
Cynthia Martin
Class of 1984
Pamela Nelson
Class of 1979
Meggan Goy
Class of 1998
Jack Spindler
Class of 1999
Meghean Rosenbach
Class of 1999
Kenneth Moon
Class of 1988
Erin Swanson
Class of 1999
Rebecca Cole
Class of 2005
Mary Mcdonough Geismann
Class of 1987
