OGO proud to announce Sean O’Callaghan named to Chicago Lawyer Magazine’s Prestigious “40 Under 40” list


Sean O’Callaghan started his legal career as a misdemeanor trial assistant in the Cook County State’s Attorney’s Office in the Fourth Municipal District’s Maybrook Courthouse. There, on average, he saw 200 to 300 cases on each morning and afternoon court call.

It’s a courthouse in which young attorneys can easily become flustered. But that never happened to O’Callaghan. Judge Paula Daleo of the Circuit Court of Cook County’s Fourth Municipal District said that hectic pace never rattled O’Callaghan.

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40 under 40