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J. Terrell Siegfried Of Counsel

T 918-594-0472 | F 918-594-0505 |

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Terrell Siegfried began his career with Hall Estill where he practiced primarily in the Corporate/Commercial, Tax and Estate Planning areas. In 2012, Terrell began an Of Counsel relationship with the firm when he became senior legal counsel at NORDAM. Today, he serves as Assistant General Counsel and Legal Secretary for the company.

Terrell has been named an Oklahoma Rising Star in Business/Corporate Law by Oklahoma Super Lawyers. In addition, in April 2011 he was named to Oklahoma Magazine's 40 Under 40 list and in February 2012 he was named to Tulsa Business Journal's 40 Under list. Terrell was a 2012 recipient of the Leadership in Law award presented by the Journal Record.


  • University of Notre Dame Law School (J.D., 2007)
  • University of Tulsa (B.B.A. in Management, 2002)


  • Oklahoma, 2007
Legal Experience
  • 2007 - Present Hall Estill
  • 2012-Present NORDAM, Assistant General Counsel & Corporate Secretary
Community Involvement
  • Board Member, the NORDAM Group, Inc.
  • Board Member & President, ARSA (Aeronautical Repair Station Association)
  • Board Member, University of Tulsa College of Law, Dean's Advisory Board
  • Board Member, Tulsa Charity Flight Night, Inc.
  • Board Member, St. Philip Neri Newman Center
  • Board Member, Gilcrease Museum National Board
  • Co-Chairman, Gilcrease Museum Collector's Reserve and Rendevous  Committees
  • Committee Member, Cascia Hall Preparatory School Special Committee
  • Committee Member, University of Tulsa Scholarship Endowment Committee
  • Gilcrease Museum, American Art Committee
  • 2010, Cystic Fibrosis Foundation, Tulsa's Top 20 New Leaders
  • 2008, Street School, Outsiders Party
  • University of Tulsa Letterman's Association
  • University of Tulsa President's Council
Professional Involvement
  • Oklahoma Bar Association
  • Tulsa County Bar Association