Nossaman LLP

Founded in Los Angeles in 1942, Nossaman LLP has remained a key player in California law and politics. The firm has pushed beyond the state’s borders to establish offices in Austin, TX; Denver, CO; New York, NY; Phoenix, AZ; Seattle, WA; Tucson, AZ; and Washington, DC.

LA Law

The firm was formed in Los Angeles when Walter Nossaman and Joseph Brady launched an eponymous office specializing in tax law. Nossaman wrote the book on trusts when he penned Trusts Administration and Taxation—an updated version of which is still published today. When Brady retired in 1962, Nossaman and his team merged with another tax firm to form Nossaman, Thompson, Moss, Scott & Riordan; name partner Richard Riordon served as Los Angeles’ mayor through most of the 1990s. Over subsequent decades, the firm continued to expand through mergers, including pairing with Washington, DC, firm O’Connor & Hannan in 2008, and by opening new offices. After the 2008 merger, the firm dropped all its other names to become simply Nossaman LLP.

Holistic Lawyering

Nossaman focuses on infrastructure; environmental law; litigation; healthcare; real estate; pensions, benefits and investments; government relations; and corporate law for clients in a number of industries. The firm has worked for Bristol-Myers Squibb Company, Lockheed Martin Corporation, 24 Hour Fitness, Brookfield Development, and Southern California Edison.

Nossaman counsels public sector clients, including government agencies, on a range of topics, such as employment, healthcare, litigation, natural resources, and real estate. When it comes to litigation, the firm has experience at trial, with appellate work, and in alternative dispute resolution. Its litigators represent clients in antitrust, environmental law, financial services, healthcare, insurance, real estate, and technology matters.

Nossaman takes a holistic approach to meeting its clients’ needs. For example, clients seeking advice on transactional matters will benefit from attorneys’ experience in employment, health law, intellectual property, real estate, and other legal areas. 

Industry Voices

You have probably heard ideas espoused by Nossaman lawyers as the firm makes them known. It posts four blogs: California Water Views, Eminent Domain Report, Endangered Species Law & Policy, and Infra Insight Blog. Nossaman also hosts a podcast on land use issues: Digging Into Land Use Law and a podcast on legal issues that impact governmental and private and non-profit pension systems and their boards: Pensions, Benefits & Investments Briefings. Moreover, the firm has a regular presence on Facebook, LinkedIn, and X.

• Georgia State Road and Tollway Authority (SRTA)–SR 400 Express Lanes. Nossaman serves as outside project counsel to the SRTA on this $11 billion project to add 16 miles of tolled express lanes along SR 400 in Fulton County, GA, which reached financial close in 2025.
• Los Angeles County Employees Retirement Association (LACERA). Nossaman is representing LACERA in its lawsuit against its former interim information security officer and SafeSec LLC, a company he secretly founded and operated using an alias. The lawsuit alleges fraud, conflicts of interest, and breach of fiduciary duty related to a bid-rigging scheme.
• City of Oakland. Nossaman is representing the city regarding the relocation of the Oakland A’s and the disposition and development of the 110-acre Coliseum Complex, which includes the former Warriors Arena and the stadium once shared by the A’s and Raiders.
• Williamson County Conservation Foundation. Nossaman is representing Williamson County, the City of Georgetown, and the Williamson County Conservation Foundation in a dispute article against the Fish and Wildlife Service’s designation of critical habitat for the Georgetown and Salado salamanders in the San Antonio metropolitan area.

• Recognized in four practice categories, namely, Energy: Renewable/Alternative Power, Environment: Litigation, Land Use/Zoning, and Project Finance, 2025—Legal 500
• Recognition of 20 attorneys along with the firm’s eminent domain and inverse condemnation, environment and land use, healthcare, infrastructure, insurance recovery, pensions, benefits and investments, and real estate groups, 2025—Chambers USA
• Construction Group of the Year, 2025—Law360