Ernest Calderón

Frank G. Long advises clients and represents them in court in matters related to trademarks, trade dress, false advertising, copyright, cybersquatting and trade secrets. His clients include, and have included, Fortune 500 corporations and small businesses, as well as national and international companies, and franchise systems. Frank assists clients with the development, administration and strategies for the protection of intellectual property rights, especially trademarks. He has a wide range...

Chris Welker is a lawyer recognized by Best Lawyers in the practice areas of Insurance Law and Personal Injury Litigation - Defendants. Chris practices law in Phoenix, Arizona Best Lawyers has recognized Chris Welker since 2024. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Chris Welker is held by other lawyers.

David Thompson's practice encompasses corporate, health care, transactional, and related business matters, with particular emphasis on providing counsel to management of small to mid-size companies. He regularly represents buyers and sellers of closely-held businesses in the negotiation, documentation, and closing of purchase and sale transactions. David also represents health care providers, including physician and other professional groups, diagnostic imaging centers, clinical laboratories ...

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...

BETSY J. LAMM is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Betsy has been recognized by Best Lawyers since 2026. This recognition is based on an exhaustive peer-review survey. Betsy has practiced her entire career at Cohen Dowd Durchslag (CDD). She joined CDD in 2008, following a judicial clerkship for the Honorable Chief Justice Ruth V. McGregor of the Arizona Supreme Court. Betsy’s practice focuses on complex commercial litigation, inc...

Leonce (Lee) A. Richard III is a 30+ year attorney whose practice focuses exclusively on all aspects of family law: Complex divorce cases Valuation and division of businesses and professional practices Division of stock grants, options and retirement plans Determinations of sole and separate versus community property Child custody (legal decision making and parenting time) Financial support (spousal maintenance and child support) Grand parent and third-party visitation and guardianship Patern...

Ms. Villanueva is an attorney in the firm’s Intellectual Property Department. She practices in the areas of domestic and international trademark and copyright prosecution, licensing and enforcement. Ms. Villanueva assists clients with brand development and with identifying various protectable aspects of the clients’ products, services and concepts. She also helps clients with clearing all aspects of advertising, promotional and marketing materials and products, including trademark...

Rod focuses his practice in all aspects of land use and planning, including zoning approvals, development master plans, variances, use permits, design review, building permitting, subdivision approvals, general plan amendments, subdivision/platting approvals and development agreements. He represents office developers, hotel developers, master planned community developers, home builders, convenience store developers, large retailers, industrial users, mobile home park owners/operators, highway...

Marvin is a partner with substantial experience representing clients in complex commercial litigation in state and federal courts in Arizona and Nevada. His practice primarily focuses on business disputes and litigation, including partnership disputes, real estate litigation, business torts, and fraud claims. Additionally, Marvin has extensive experience litigating debtor/creditor relationships, including prosecuting fraudulent transfer actions and obtaining prejudgment remedies; defending cl...

As an attorney and certified public accountant, Erik focuses his practice in all areas of federal tax law, with an emphasis on partnerships, limited liability companies, C and S corporations, real estate, international taxation, and civil tax controversy. He provides tax planning, structuring, and documentation for business and individual clients, including joint ventures and tax-exempt organizations. Prior to joining Gallagher & Kennedy, Erik was a Manager in the Washington National Tax ...