Mark E. Barker
About Mark E. Barker
Mark E. Barker is a lawyer based in Phoenix, AZ and has been recognized in The Best Lawyers in America® since 2009. Mark E. Barker is recognized in the following practice areas:
- Phoenix, Arizona
- Business Organizations (including LLCs and Partnerships)
- Construction Law
- Litigation - Construction
- Litigation - Real Estate
Current Firm: Jennings Haug Keleher McLeod Waterfall LLP
Education: The University of Arizona, J.D., graduated 1984
Location: Phoenix, AZ
It takes just a few minutes to optimize your profile for clients looking to engage and lawyers who are ready to refer.
Activate your profile and highlight why your peers recognized in Best Lawyers today.
Nearby Lawyers
Nora Jones is a top attorney recognized by Best Lawyers in the practice area(s) of Elder Law, Litigation - Trusts and Estates and Trusts and Estates. Nora, who practices law in Phoenix, Arizona, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Nora is held by other top lawyers in the same geographic and legal practice area.
Peter’s focus is protecting businesses and securing their future through risk management, litigation, and dispute resolution. Peter has extensive experience litigating in Arizona state and federal courts and has represented businesses of all sizes in the Arizona Court of Appeals and the United States Court of Appeals for the Ninth Circuit. Peter routinely handles matters involving business litigation, commercial real estate disputes, insurance coverage, employment disputes, and commerci...
Michael E. Pietzsch is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law and Tax Law. Michael E., who practices law in Phoenix, Arizona, has been recognized since 1987. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael E. is held by other top lawyers in the same geographic and legal practice area.
Bradley A. Cosman is a top attorney recognized by Best Lawyers in the practice area(s) of Bankruptcy and Creditor Debtor Rights / Insolvency and Reorganization Law. Bradley A., who practices law in Phoenix, Arizona, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Bradley A. is held by other top lawyers in the same geographic and legal practice area.
Known for his extensive work in corporate and business law, Michael Aguirre excels at helping organizations of all sizes and maturities address complex legal and business challenges. Michael has wide-ranging experience in corporate finance, mergers and acquisitions, and general business transactions, as well as counseling executive teams and boards on corporate governance and various corporate matters. He has also advised clients in complex state, federal, and local regulatory environments, i...
Joshua Fisher has tried over two hundred cases before juries in state, federal, and military court, including DUI and vehicular crimes, complex felony and fraud, homicide and second-degree murder, theft, white collar crimes, sex crimes, and various other criminal defense matters. He has also handled administrative and licensing hearings, advocating for professionals before various medical boards in Arizona. After over 15 years working as a government prosecutor, Joshua moved into private prac...
For more than 20 years, Mark has represented companies in dealing with a broad range of issues that affect them as employers, from union avoidance campaigns and employment-related litigation to complex cases involving the theft of intellectual property and trade secrets, and litigation under the False Claims Act. Mark’s traditional labor practice is national in scope: he has handled dozens of campaigns against union organizing efforts across the country. Because the key to employer succ...
Andrew W. Gould is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative / Regulatory Law and Commercial Litigation. Andrew W., who practices law in Phoenix, Arizona, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Andrew W. is held by other top lawyers in the same geographic and legal practice area.
Susan lived in Argentina as a child and is fluent in Spanish. While living in Argentina, she travelled often to Brazil to visit family and eventually learned to also speak Portuguese. Her multilingual proficiency led Susan to volunteer by assisting Spanish speaking individuals at the Family Court Facilitator’s Office in Orange County, California. Susan also worked as a Spanish translator in the telecommunications industry. In her practice, Susan is privileged to represent many Spanish-s...
Mr. Delo practices primarily in the areas of medical malpractice defense, healthcare law, personal injury, and commercial litigation. He focuses his practice on the defense of physicians in medical malpractice cases on behalf of the largest medical liability insurer in Arizona and other carriers. Mr. Delo has significant experience in litigating healthcare coverage issues and has represented health maintenance organizations (HMOs) in numerous matters. He also represents physicians in discipli...
Explore and Learn
Recognizing Legal Leaders: The 2027 Best Lawyers Awards in Australia, Japan and Singapore
by Jamilla Tabbara
Market drivers, diversity trends and the elite practitioners shaping the legal landscape.
Holiday Pay Explained: Federal Rules and Employer Policies
by Bryan Driscoll
Understand how paid holidays work, when employers must follow their policies and when legal guidance may be necessary.
Can a Green Card Be Revoked?
by Bryan Driscoll
Revocation requires a legal basis, notice and the chance to respond before status can be taken away.
How Far Back Can the IRS Audit You?
by Bryan Driscoll
Clear answers on IRS statutes of limitations, recordkeeping and what to do if you are under review.
Musk v. Altman: The Lawyers Behind the Case
by Jamilla Tabbara
Meet the Trial Lawyers Shaping One of AI's Biggest Legal Disputes.
Can You File Bankruptcy on Credit Cards
by Bryan Driscoll
Understanding your options for relief from overwhelming debt.
US Tariff Uncertainty Throws Canada Into Legal Purgatory
by Bryan Driscoll
The message is clear: There is no returning to pre-2025 normalcy.
The Legal Teams Behind the Blake Lively–Justin Baldoni Settlement
by Grace Greer
A closer look at the legal teams and attorneys involved in the Blake Lively–Justin Baldoni litigation and its resolution.
How AI Is Changing the Way Clients Find Lawyers
by Jamilla Tabbara
Best Lawyers CEO Phil Greer explains how AI-driven search tools are reshaping legal marketing and why credibility markers matter.