David Sieck

Keith has substantial experience litigating complex commercial matters in a variety of contexts, including business torts, injunctive proceedings, legal malpractice defense, and claims against directors and officers. He has served as lead counsel in the defense of class actions. Additionally, Keith represents broker-dealers and investment professionals in the litigation, arbitration, and regulatory arenas. He has been involved in evidentiary injunctive matters on a broad range of issues, incl...

Susan M. Swick is a lawyer recognized by Best Lawyers in the practice area of Family Law. Susan M. practices law in Phoenix, Arizona Best Lawyers has recognized Susan M. Swick since 2013. 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 Susan M. Swick is held by other lawyers.

David focuses his practice in family law. He assists clients with divorces, child custody issues, post-decree modifications, and pre- and post-nuptial agreements. David is experienced with high conflict family law matters and has tried numerous cases. He has particular expertise when dealing with issues relative to children both during dissolution and issues that arise after a client’s divorce or establishment matter. David passionately advocates for what matters most to his clients and...

Roger Cohen has over 40 years’ experience as a business attorney, representing clients in both litigation and transactions. He has a deep knowledge and understanding of commercial law and the litigation process and is a forceful and effective advocate for his clients. Roger’s experience as a transactional attorney adds value in the litigation setting, as he can relate the documentation process to issues that arise in business and commercial disputes. Conversely, his knowledge and ...

Mr. Nussbaum’s areas of practice include complex bankruptcy law, real estate, construction, and contract law. Mr. Nussbaum is a certified specialist in bankruptcy law by the Arizona Board of Legal Specialization and is also certified specialist in business bankruptcy law by the American Board of Certification. Mr. Nussbaum is an AV-Preeminent rated attorney and received his Bachelor of Arts degree, cum laude, from Arizona State University and his law degree from the Sandra Day O’C...

Daniel E. Durchslag is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation and Litigation - Real Estate. Daniel, 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 Danie is held by other top lawyers in the same geographic and legal practice area.

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...

Jim practices corporate finance and real estate law, representing local and national real estate developers, lenders and investors with commercial real estate matters including apartments, industrial, office and retail projects, master planned communities and shopping centers. Jim has negotiated leases with national retail tenants, assisted borrower clients with securitized loans and synthetic leases, drafted various joint venture agreements and both closed and enforced secured loans in real ...

OVERVIEW Trevor practices in the areas of environmental and natural resources compliance, permitting, and litigation. Trevor advises clients on a variety of environmental topics, including federal, state, and local air programs; stormwater and SPCC compliance; and waste and hazardous waste management. Trevor has worked on various environmental issues in administrative appeals and in state and federal courts, as well as advised local administrative boards during appeals. Trevor also assists cl...

Stephanie L. Chilton is a lawyer recognized by Best Lawyers in the practice area of Product Liability Litigation - Defendants. Stephanie L. practices law in Sun City, Arizona Best Lawyers has recognized Stephanie L. Chilton 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 Stephanie L. Chilton is held by other lawyers.