David S. Cohen

Laura Sixkiller is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation, Litigation - Mergers and Acquisitions, Litigation - Regulatory Enforcement (SEC, Telecom, Energy) and Litigation - Securities. Laura, who practices law in Phoenix, Arizona, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Laura is held by other top lawyers in the same geographic and legal practice area.

Chris is a member of Keller Rohrback’s Complex Litigation and Bankruptcy Groups. He has represented debtors, creditors, Court-appointed committees, and asset purchasers in Chapter 11 reorganization proceedings and workouts. In recent years he has also focused on representing plaintiffs in ERISA class actions. Chris has wide-ranging experience in complex commercial matters, from corporate restructuring to breach of fiduciary duty, commercial real estate, contracts, patent infringement, a...

With more than twenty years of experience in federal, state, and local air quality laws and in representing clients across the U.S. from a variety of industries, Bill is uniquely skilled at providing effective counsel and working toward solutions that best serve his client’s specific needs. Bill is dedicated to helping clients understand their compliance obligations under the myriad of air quality programs, regulations, and agency guidance so that such obligations can be managed as effe...

Scot Claus’s practice is wide-ranging and varied. As a result, he regularly represents clients in the following areas: Constitutional Law and Defense of Governmental Entities, Complex Commercial Litigation, Class-Action Litigation, Securities Fraud Litigation, Professional Liability Defense, Real Property Litigation (including commercial leasing disputes, easement and boundary disputes, and condemnation matters), Product Liability, and Intellectual Property litigation and prosecution. M...

Marki Stewart assists hospitals, physician groups, ambulatory surgery centers, telemedicine providers, and other health care organizations in a variety of business and regulatory issues, including the Anti-Kickback Statute and the Stark Law, reproductive health law in the wake of the Dobbs decision, medical practice acquisitions, Arizona Department of Health Services licensing issues, medical staff peer review matters, and hospital-physician joint ventures. Marki has a special focus and inter...

Andrew Pappas is a nimble advocate and trusted counselor whose practice focuses on appeals, complex commercial disputes, and governmental and regulatory matters. Before joining Osborn Maledon, Andrew served as general counsel of the Arizona House of Representatives, where he was the principal legal advisor to the Speaker and members of the majority caucus. In that capacity, Andrew provided legal, policy, and strategic advice on a vast range of issues, with a particular focus on elections, red...

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...

Chris Welker is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law and Personal Injury Litigation - Defendants. Chris, who practices law in Phoenix, Arizona, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Chris is held by other top lawyers in the same geographic and legal practice area.

Kurt A. Peterson has practiced in the areas of commercial finance, real estate and general business law for nearly 30 years. His practice is concentrated in commercial and corporate transactions, including complex real estate transactions involving all aspects of acquisition, finance, development, leasing, operation and disposition of commercial, retail, residential, multi-family and agricultural property.Kurt has a broad commercial banking and finance practice, in which he advises banks and ...

Mr. Clees represents employers throughout the United States in discrimination and wrongful discharge cases and labor relations. He also counsels clients on a wide array of state, federal and tribal compliance laws. Mr. Clees has been singled out by Chambers USA America’s Leading Lawyers as one of the top labor and employment law attorneys in the country for many years in a row and as a Chambers USA Top Leader in his Field. He has been applauded for his “integrity and common sense&...