Thomas "Jack" O'Brien

Tell your own story about Thomas

Memories and condolences can be left on the obituary at the funeral home website.

How you can show support

Get email updates whenever changes are made.

Send flowers

Consider sending flowers.

Plant trees

Honor them by planting trees in their memory.

Share this page

Invite other friends and family to visit the page.

Pierson’s Funeral Service

Posted an obituary

March 16, 2026

Thomas O'Brien Obituary

Written by our Dad - Thomas Jack O'BrienT. Jack O’Brien of Calgary passed away on March 16, 2026 at the age of 98. He is survived by his children Mike (Diane) O’Brien, Susan Morris, Tom (Susannah) O’Brien, Don (Linda) O’Brien, as well as 10... Read Thomas O'Brien's Obituary