ACCL Membership Directory

Marion T. Hack

  • Member
  • Cozen O'Connor
  • 601 S. Figueroa Street, Suite 3700
  • Los Angeles, California 90017
  • Email:
  • Phone: 213.892.7993
  • Cell:
  • Company Phone: 213.892.7900
  • Fax:


  • Undergraduate: B.S. Business Administration University of Southern California 1989
  • Law School: JD University of the Pacific, McGeorge School of Law 1995


Marion has more than 20 years of experience practicing in construction and commercial litigation. She is recognized as a leading construction lawyer by Chambers USA: America’s Leading Lawyers for Business. Notably, she recently represented two of the world’s largest global construction design/consulting firms to soundly defeat a $100 million breach of contract claim and achieved a unanimous award of nearly $5 million for the clients for unpaid invoices in a jury trial lasting three months.

Marion’s practice includes a wide array of construction industry matters such as bidding disputes, contract negotiations and drafting, scheduling and delay issues, mechanics lien and claims resolution at both the state and federal level. Her broad range of legal experience includes public and private works projects including, roads, bridges, vertical construction, power facilities, environmental remediation, airports, school facilities, professional sports stadiums, concert halls, mass transit, and other heavy construction projects, including all types of general building design and construction. Marion also has extensive experience with construction licensing issues (including expert witness work) and false claims act defense.

Professional Activities

American Bar Association, Forum on Construction Law (Division 13 – steering committee)
American Arbitration Association’s Construction Disputes Panel Of Arbitrators and Mediators (2017-Present)
Southern California Development Forum, Past President
Association Of General Contractors: Member, Legal Advisory Committee California (Vice Chair, 2014; Chair, 2015)
CMAA, Member, Legal Committee

Representative Articles, Publications, Speeches and Seminars

Publications (partial)

a. “Legal Doctrines”, The Construction Lawyer, Summer 2020.
b. “Covenants and Conditions in Government Contracting”, AGC Law in Brief, June 2020
c. “What Constitutes An Emergency In Public Contracts?” AGC Law in Brief (Volume 5, Issue 3), Practical Construction Law & Risk Issues May 2019.
d. “Buying An Existing Construction Operation? Do Your Due Diligence” AGC Law in Brief (Volume 4, Issue 6), Practical Construction Law & Risk Issues Nov/Dec 2018.
e. “Fixed-Price Contracts Are Simple – Or Are They?” Pepper Hamilton LLP Client Alert, November 2017
f. “False Claims Act – Implied False Certification Theory Of Liability Recently Defined By SCOTUS Should Be A Concern For Contractors,” AGC Law in Brief, Practical Construction Law & Risk Issues, August 2016
g. “California Court Limits Recovery For General Contractors Relying On Subcontractor Bids,” Pepper Hamilton LLP Client Alert, August 2016
h. “LAC Helps AGC Members Navigate Ever-Changing Legal Environment,” California Constructor, May/June 2015

Speaking Events (partial):

a. New Case Law Review 2021, Los Angeles County Bar Association, 2021

b. Best Practices in Remote Arbitrations, ABA Construction Forum, Div 13, 2021

c. What’s the Deal with Consequential Damages, ABA Construction Forum Div. 5, 2021

d. “Success Tips for Female Lawyers” Indianapolis Bar Association, October 2020

e. “Ethical Issues in Design-Build” DBIA Annual Conference, November 2019

f. “The Many Ways to Skin a Cat: In-House Counsel’s Preferences to Dispute Resolution” Construction SuperConference, December 2018

g. “Is There A Doctrine In The House? Legal Doctrines for Design-Build Professionals” 2018 Annual Design-Build Institute of America Conference & Expo, November 2018

h. “Is There A Doctrine In The House? – And Other Hot Topics,” 9th Annual CLE Conference for EPC Contractors, Kansas City, MO, May 2018

i. “Is There A Doctrine In The House?” Victor O. Schinnerer & Company, Inc.’s 57th Annual Meeting of Invited Attorneys, May 2018
j. “Ethical Dilemmas for Construction Attorneys: Where the Ethical Choice and Legal Standards Diverge,” American Bar Association Forum on Construction Law 2018 Annual Meeting, April 2018
k. “The Ten Most Important Legal Issues in Design/Build Agreements,” 2017 Annual Design-Build Conference & Expo, November 2017

Court Admissions

a. California – 1995
b. U.S. District Courts of California – Central District – August 27, 1999
c. U.S. District Courts of California – Northern District – October 4, 2001
d. U.S. District Courts of California – Southern District – October 22, 2009
e. U.S. District Courts of California – Eastern District – May 7, 2018
f. U.S. Court of Appeal – Ninth Circuit – February 2020.

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