Crystal Lake South High School Alumni
Crystal Lake, Illinois (IL)
Derek Duffy
Crystal Lake South High School
Class of 1990
→ Join 2683 Alumni from Crystal Lake South High School that have already claimed their alumni profiles.
→ There are 59 classes, starting with the class of 1943 all the way up to class of 2026.
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.
Breanna Bellman
Class of 2000
Samantha Dickman
Class of 2005
John Bailey
Class of 1984
Lisa Intveldt
Class of 1998
Kenny Woolsey
Class of 1992
John Harris
Class of 1982
Sue Koscielniak
Class of 1986
Kristie Daley
Class of 1994
Lisa Schlobohm
Class of 1999
Valay Brahmbhatt
Class of 2010
Jeffrey Clarkson
Class of 1997
Roger Miller
Class of 1987
Nicole Eggert
Class of 1996
Katrina O'reilly
Class of 1990
Brian Tevenan
Class of 1999
Claire James
Class of 2001
Brad Howard
Class of 1998
Brian Seavall
Class of 1982
