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After more than 30 years in a complex civil litigation practice, Glenn E. Tremper, Esq. now serves exclusively as a neutral mediator, arbitrator, facilitator and special master. Glenn has particular experience and skill in the areas of complex commercial litigation, construction defects and disputes, estate and probate disputes, business tort disputes, professional malpractice claims, closely-held business disputes, insurance coverage and claims handling, family farm and ranch disputes, corporate and partnership separations, family business succession planning, personal Injury and other complex litigated matters.  He has represented clients in commercial real estate development matters, leasing and other business management issues.

Glenn has served as a mediator over 30 litigated cases since 2015, and has represented one or more parties in over 70 separate mediations over the past 12 years. Since November of 2019, he is no longer taking on litigated matters in order that he may offer neutral and impartial dispute resolution services.

Glenn views conflict as a necessary and valuable part of human legal, business and family interactions, and maintains a firm belief that the parties and their counsel usually possess the necessary skills and experience to discuss and resolve their differences, provided the obstacles to resolution can be overcome by a skilled mediator. Each conflict is different, and a mediator employs a number of different approaches based on the parties, counsel and circumstances encountered. A good mediator is Intelligent, Knowledgeable, Persistent, Hard-working, Tenacious, Committed, Neutral, an Advocate for Realistic Thinking, Innovative and Flexible, Respectful, Patient, Understanding, Trustworthy, Empathetic, and Optimistic.

Glenn Tremper

Glenn E. Tremper


1984 - 1987 - University of Montana School of Law, Missoula, Montana, J.D. (High Honors)

1980 - 1984 - Carroll College, Helena, Montana, B.A. Philosophy, B.A. Theology (Maxima Cum Laude)

1976 - 1980 - Bozeman Senior High School, Bozeman, Montana.

Relevant Training

(registered) October 19, 2020 – Advanced Mediator Training Series:  The Extent or Limit of Mediator Influence to Effect Settlement, (8 hours) American Arbitration Association, New York, New York.

April 20 – May 1, 2020 – Mediating Online: Mediating Workplace, Property and Commercial Disputes Online, (20 hours), Mediate.com (Online Interactive Video Presentation).

March 9-10, 2020 – 13th Annual Arbitration Training Institute (12 hours), ABA Dispute Resolution Section, Arizona State University, Phoenix, Arizona.

June 22- 24, 2017 - Mediation of Complex Construction Disputes (18 hours), Straus Institute for Dispute Resolution, Pepperdine Law School, Malibu, California.

August 3 - 8, 2015 - Mediating the Litigated Case (42 hours), Straus Institute for Dispute Resolution, Pepperdine Law School, Malibu, California.

June 23, 2015 - Kick-Starting an Arbitration: Determining an Arbitrator’s Authority and Disclosures (1.5 hours), ABA Center for Professional Development (Live Webinar)

May 5, 2015 - Debunking the Myths and Misperceptions of Construction Arbitration (1.5 hours), American Arbitration Association (Recorded Webinar)

April 27, 2015 - The Dynamics of Multi-Party Mediation for Large, Complex Construction Disputes (1.6 hours), American Arbitration Association (Recorded Webinar)

April 23, 2015 - Best Use of Med-Arb: The Advantages (1.6 hours), American Arbitration Association (Recorded Webinar).

May, 2013, 2016 & 2018 - Three-time Attendee at West Coast Casualty Construction Defect Seminar, Anaheim, California, including presentations relating to mediation of complex construction defect and coverage disputes.

Relevant Presentations

January 18 - 19, 2019 - “Being In Conflict: The Softer (but Harder) Side of Resolving Disputes,” 2019 CLE & Ski, State Bar of Montana CLE Institute, Big Sky, Montana.

October 26, 2018 - “On the Hook: General Contractors, Subcontractors and Joint and Several Liability in Montana (How do you Solve a Problem like Metro Aviation?),” 2018 Construction Law Section CLE, State Bar of Montana CLE Institute, Bozeman, Montana.

May 19, 2016 - “Defective Construction Litigation,” Cascade County Bar Association Meeting, Great Falls, Montana. 

October 9, 2015 - “Establishing the Standard of Care in the Wild West of Montana Using the Building Codes and Other Standards” (with Kellie G. Sironi), 2015 Construction Law Section CLE, State Bar of Montana CLE Institute, Bozeman, Montana.

June 13, 2014 - Facilitator, “New Lawyer’s Workshop,” State Bar of Montana CLE Institute, Helena, Montana. 

April 20, 2012 - “Anatomy of a Residential Construction Defect Case,” Spring Seminar, Montana Trial Lawyers Association, Great Falls, Montana.

Relevant Recognition and Affiliations

AV-Preeminent Rating, Martindale-Hubbell

Admitted to practice in Montana and California (inactive).

Admitted to U.S. District Court for Districts of Montana & Colorado

Admitted to U.S. Court of Appeals, Ninth Circuit and Federal Circuit

Admitted to U.S. Supreme Court


2007 - Present: Law Office of Glenn E. Tremper, PLLC, Great Falls, Montana.   

1993 - 2007: Church, Harris, Johnson & Williams, P.C., Great Falls, Montana.   

1992 - 1993: Pillsbury, Levinson & Mills, P.C., San Francisco, California.  

1989 - 1992: Steinhart & Falconer, P.C., San Francisco, California.   

1988 - 1989:  Church, Harris, Johnson & Williams, P.C.  

1987 - 1988: Law Clerk to Chief Judge James R. Browning, U.S. Court of Appeals for the Ninth Circuit, San Francisco, California. 


Glenn is a fourth-generation Montanan, born on May 1, 1962, in Missoula, Montana, as the youngest in a family of six children.  For the past 30 years, he has been married to Peggy O’Leary, a CPA, and they have two adult children.  Since 2001, he has served as an officer and director of Tremper Shopping Center, Inc., a family-owned neighborhood retail center in Missoula.  He has served, or currently serves, as chair of the Building Committee of Holy Spirit Catholic Parish, the Memorial Garden Committee and the Advisory Board to the Monastery of St. Clare in Great Falls.  He is a past president of Great Falls Habitat for Humanity, and served as a trustee of the State Bar of Montana Group Benefits Trust.  He is a member of the American Bar Association, Montana Bar Association, Cascade County Bar Association, American Association for Justice, and Montana Trial Lawyers Association.  Glenn enjoys travel, skiing, sailing, boating, hiking, and San Francisco Giants baseball. 

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Glenn E. Tremper, PLLC

This web site is designed for general information only. The information presented at this site should not be construed to be formal legal advice nor the formation of a lawyer/client relationship. All services are provided by Glenn E. Tremper, PLLC, a Montana Professional Limited Liability Corporation.

(406) 761-9400

Glenn E. Tremper, PLLC
300 River Drive North, Suite 5
Great Falls, Montana 59403-2263

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