Theresa Sullivan Obituary
We are sad to announce that, on March 1, 2026, at the age of 68, Theresa Sullivan (Arlington Heights, Illinois) passed away. Family and friends can send flowers and condolences in memory of the loved one. Leave a sympathy message to the family on the memorial page of Theresa Sullivan to pay them a last tribute.
She was predeceased by: her parents, Donald Glad and Catherine Glad. She is survived by: her husband Michael Sullivan; her son John Sliwicki (Fiona); her grandchildren, Parker and Fiona; and her siblings, Pam Plaza (Mike), Richard Glad, Thomas Glad, Debbie, Donna Porretta (Louis), Linda Markgraf, Pat Glad and Mary White.
