Hartford Union High School Alumni
Hartford, Wisconsin (WI)
Mary Jean Sienko (Mary Jean O'Brien)
Hartford Union High School
Class of 1974
→ Join 2941 Alumni from Hartford Union High School that have already claimed their alumni profiles.
→ There are 75 classes, starting with the class of 1925 all the way up to class of 2022.
MARY JEAN'S PROFILE
| First Name | Mary Jean |
| Last Name | Sienko |
| Maiden Name | O'brien |
| Graduation Year | Class of 1974 |
| Gender | Female |
| City | N/A |
| State/Province | MI |
| Country | United States |
| Occupation | Veterinarian |
| Married | Yes |
Class of 1974 Alumni
→ Reunite with 32 class of 1974 alumni that have joined.
Joe Haseleu
Class of 1984
Robert Gunst
Class of 1979
Jake Gilane
Class of 2001
Erica Schulz
Class of 1999
Cyndee Schmitz
Class of 1992
Hugh Smith
Class of 1988
Christine Keating
Class of 1980
Janel Dautermann
Class of 1986
John Rettler
Class of 1974
John Fitzsimmons
Class of 1984
Paul Rehlinger
Class of 2004
Catherine Francie Stephans
Class of 1981
Elizabeth Neff
Class of 2007
Mandy Rasmussen
Class of 1994
Aaron Hesselink
Class of 2006
Thomas Moravec
Class of 1988
Janice Berghammer
Class of 1980
Sarah Wegner
Class of 2000
Nichole Lackas
Class of 1999
Leroy Wolf
Class of 1960
Mark Wagner
Class of 1991
Mary Algiers
Class of 1980
Allen Carlsen
Class of 1969
Joni Wascher
Class of 1998
