Baylor Law School,
J.D., cum laude, 2011, Articles Editor, Baylor Law Review; Dean’s List; Order of the Barrister; Quarterfinalist, Baylor University Dawson & Sodd Moot Court Competition
M.A., Taxation, 2007
B.B.A., Accounting, cum laude
Texas USDC, Eastern District
Texas USDC, Northern District
Texas USDC, Southern District
Texas USDC, Western District
Antitrust & Business Litigation Council, State Bar of Texas
Dallas Bar Association’s Women Empowered to Lead in the Legal Profession
Federal Bar Association – Dallas Chapter
Vice President, 2015-2016
Dallas Association of Young Lawyers
Co-Chair, Ask-A-Lawyer Committee, 2013-2016
Freedom Run Committee, 2013-2016
DAYL Leadership Committee, 2014
Texas Association of Defense Counsel
Young Lawyer Committee
Dallas Bar Association
DRI, Voice of the Defense Bar
Women’s Energy Network
Ones to Watch, The Best Lawyers in America© by Woodward/White Inc. (Commercial Litigation, Health Care Law), 2021
Rising Star, The Legal 500 US by Legalease (Dispute Resolution: General Commercial Disputes), 2019
Texas Rising Stars® by Thomson Reuters (Business Litigation), 2016-2020; Top 50 Texas Women Up-and-Coming Attorneys and Top 100 Texas Up-and-Coming Attorneys, 2019-2020
“Best Lawyers Under 40 in Dallas” by D Magazine, 2020, 2021
Thompson Coburn LLP
Thompson & Knight LLP
68th District Court, Dallas
Judicial Intern for the Honorable Martin Hoffman, 2010
Cattle Baron’s Ball for the American Cancer Society
Raffle Chair, 2018-2021
Heroes for Children
Heroes and Handbags Host Committee, 2017
Make-A-Wish Foundation, Dallas Area Regional Advisory Council
Young Leaders Council
Chair, Walk for Wishes, 2016
Mackenzie is an experienced trial attorney who represents health care entities and other businesses and directors in high-stakes litigation matters.
Mackenzie has extensive experience representing hospitals and health care providers in coverage and reimbursement disputes; fraud, and civil RICO claims; Texas Prompt Pay Act, qui tam, and False Claims Act litigation; and matters relating to the violation of federal and state anti-kickback provisions and Stark laws.
She also advises corporations and directors on various aspects of shareholder and securities litigation, corporate and shareholder rights, director and officer litigation, merger litigation, and white-collar criminal litigation. She has helped clients navigate class actions alleging breaches of fiduciary duty and securities fraud and advised companies and individual directors facing DOJ and SEC investigations. Mackenzie also has represented Receivers in multiple SEC receivership actions.
Mackenzie has advised numerous companies regarding antitrust policy and compliance matters, and represented retailers and manufacturers facing antitrust suits.
She also has experience in cybersecurity policy and litigation, and the development and enforcement of privacy and data security policies.
Represents hospital and healthcare providers in managed care disputes with insurance companies.
Represented out-of-network health care providers in reimbursement litigation for services rendered to insured patients.
Represented health care providers in regard to investigations of audits and fraud.
Represented a national pharmaceutical company"s response to a Civil Investigative Demand and defense of alleged violations under the Texas Medicaid Fraud Prevention Act from the Texas Attorney General"s Office related to the company"s drug price reporting.
Represented health care providers in fraud and civil RICO matters, both as plaintiffs and defendants.
Represented a health care provider in matters related to a third-party subpoena in federal court.
Represented a health care provider in responding to civil investigative demands (CIDs) from the federal government.
Representing health care providers enforcing their rights under the Texas "prompt pay" statutes.
Obtained a $65 million jury verdict in favor of the Life Partners Creditors" Trust in a case against Life Partners" founder and former CEO, its former general counsel and president, and various other entities related to a fraudulent scheme involving the sale of life settlements.
Represented former NASDAQ-listed oil and gas company and former executives in lawsuits related to a $4.4 billion tender offer and merger, including injunction and class certification hearings.
Represented former board members of a publicly traded oil and gas company over allegations of fraud, breach of fiduciary duty and fraudulent transfer.
Represented a NYSE-listed jewelry and bullion company in a shareholder derivative suit and 10b-5 class action alleging breaches of fiduciary duty and securities fraud.
Represented a privately owned animal feed company in relation to minority shareholder inquiries and threatened minority shareholder oppression claims.
Represented an accountant as individual witness in front of the SEC and DOJ as part of a government investigation into insider trading at a Fortune 500 company.
Represented the Audit Committee of a Nasdaq-traded consumer goods and financing company in an independent investigation.
Represented the Trustee in In re Life Partners Holdings, Inc., handling asset seizures and liquidation, investor claims and distributions, and third-party litigation to maximize the value of the debtor"s estate.
Represented the Receiver in SEC v. BUCF, handling asset seizures and liquidation, investor claims and distributions, and third-party litigation to maximize the value of the Receivership Estate.
Represented the Receiver in SEC v. Stanford International Bank, handling outside litigation.
Represented the Receiver in SEC v. Millennium Bank, et al., handling investor claims and distributions and third-party litigation to maximize the value of the Receivership Estate.
Represented a putative class of independent retailers of higher education course materials in an antitrust suit against publishers and other retailers.
Represented a manufacturer in direct and indirect purchaser putative class actions regarding an alleged conspiracy to fix prices.
Represented a manufacturer in an adjudicatory proceeding before the Federal Trade Commission involving price-fixing allegations.
Advised numerous companies regarding antitrust policy and compliance matters.
Direction for Directors Post-Marchand: An Overview of Director Liability and Exposure
The Texas Lawbook August 2020
The Doctor Will (Virtually) See You Now
D Magazine July 2020
Client Alert: Supreme Court Permits SEC Disgorgement of Net Profits, in Liu v. SEC
Recent State and Federal Legislation Regarding ‘Surprise Billing'
American Health Lawyers Association’s PG Briefing January 2020
SCOTX Erects New Hurdle for Litigating Anonymous Defamation
The Texas Lawbook February 2019
Aviation Cybersecurity: An Introduction to the Problem and the Developing Law
ABA The Brief Summer 2017
Standing is Key Issue in Cyber Lawsuits
Today's General Counsel June/July 2016
Change in the Legal Climate: Budgeting and Project Management
Inside Counsel July 2014
Internal investigations and the Effect of Barko
Financier Worldwide July 2014
A Higher Duty and Heavier Burden: Fiduciary Duty Litigation and Burden Shifting
ABA Trial Evidence Committee Newsletter Spring 2014
Buried in Regulations: Emerging Issues in the Aviation Industry
The Brief Spring 2014
Federal Rule of Civil Procedure 45: Amendments and Changing Subpoena Practices
For the Defense February 2014
Fiduciary Duty Litigation and Burden Shifting
American Bar Association Section of Litigation Trial Evidence Newsletter Winter 2014
Fleeing the Homeland: The Aggressive Pursuit of Merger Litigation Outside of Delaware
In-House Defense Quarterly Winter 2013
From Twitter to the Global Economy: Changes in the Trade Secret Landscape
State Bar of Texas Corporate Counsel Section Newsletter Fall 2012
The Fight Between Airline Carriers and GDSs Continues
ABA Section of Antitrust, Transportation, Energy & Antitrust Newsletter Spring 2012
Direction for Directors Post-Marchand
National Association of Corporate Directors September 2020
A Guide for Directors to Avoid Fiduciary Liability
Consumer Protection Update
ABA Antitrust Law Section June 2019
Fraud & SEC Updates
North American Petroleum Accounting Conference May 2019
Fraud Investigations and Privilege
29th Annual DFW Fraud Conference May 2019
SEC Update (Accounting)
North American Petroleum Accounting Conference May 2018
SEC Update and Changes
National Association of Petroleum Accountants Conference May 2017
Aviation & Cybersecurity
American Bar Association Tort Trial & Insurance Practice Section: Tips From Cockpit to Courtroom November 2016
Fraud, Fraud Detection, and Compliance
University of Texas at Dallas Oil & Gas Financial Management Seminar May 20, 2016
Protecting Client Confidences and Valuable Property of the Estate: Ethical Obligations and Best Data Security Practices
American Bankruptcy Institute 2016 Caribbean Insolvency Institute February 2016
Cyber Security: Legal Perspectives
Texas Society of Certified Public Accountants, Fort Worth Chapter September 2015
Cybersecurity: What Attorneys (and Their Clients) Need to Know
State Bar of Texas 25th Annual Estate Planning & Probate Drafting Seminar October 2014
Amendments to FRCP 45, Federal Non-Party Subpoena Requirements
Texas Association of Defense Counsel Winter Meeting Winter 2014
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