Litigation & Dispute Resolution
Trial-tested advocacy for businesses, institutions, and individuals in complex disputes across California, from a firm founded by a former United States District Judge and frequently retained by other attorneys.
Litigation & Dispute Resolution Services
Business & Commercial Litigation
Disputes over contracts, business torts, unfair competition, and commercial relationships, handled in California state and federal trial courts through verdict where needed.
Class Actions
Prosecution and defense of class and representative actions, including consumer, employment, and business claims, from pleading and certification through trial and appeal.
Corporate, Shareholder & Partnership Disputes
Litigation over corporate governance, ownership, partnership and shareholder rights, business divorces, and dissolutions for closely held and family-owned California enterprises.
Trade Secret & Unfair Competition
Protection and defense of trade secrets, confidential information, and competitive relationships, including injunctive relief and litigation over unfair business practices.
Insurance Bad Faith & Coverage
Representation in insurance coverage disputes and bad faith litigation, drawing on the firm's established insurance defense and civil litigation experience.
Appellate Advocacy
Appeals before the California Courts of Appeal, the Ninth Circuit, and the United States Supreme Court, arising from the firm's own trials and matters referred by other firms.
How We Serve Our Clients
Litigation is the foundation of Wanger Jones Helsley's practice. The firm represents businesses, institutions, and individuals in complex commercial, corporate, real property, and insurance disputes, handling matters in California state and federal trial courts and on appeal. Its attorneys have collectively tried many cases to verdict across the state.
Founded in 1995 by the Honorable Oliver W. Wanger, a former United States District Judge, the firm brings bench-level perspective to how complex cases are won. WJH is frequently retained by other law firms as trial and appellate co-counsel, a reflection of its reputation as a trial firm.
Whether a matter calls for aggressive trial advocacy, a negotiated resolution, mediation, or arbitration, the firm tailors its approach to the client's commercial goals. Clients range from Fortune 500 companies to closely held businesses and individuals, served from offices in Fresno and Sacramento across the Central Valley and California.
What to Expect from WJH
Trial-Tested
The firm was built by trial lawyers, including a former federal judge and an attorney who argued before the United States Supreme Court. That credibility shapes how every case is prepared and positioned.
Strategic
Litigation serves the client's larger objective, not the other way around. The firm assesses risk early and recommends the path — trial, settlement, or alternative resolution — that best advances the outcome.
Full-Service
The firm's transactional and litigation teams work side by side, so disputes benefit from business judgment and deals benefit from a litigator's foresight. Clients get coordinated counsel rather than a single-discipline view.
Attorneys in this Practice












Frequently Asked Questions
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Explore adjacent Practice Specialties.
Corporate & Business
Strategic counsel for businesses at every stage, from formation and governance to transactions, restructuring, and regulatory compliance, across California.
Insurance Defense
Defense of insurers and insureds in coverage disputes, bad faith claims, and civil litigation, backed by the firm's trial experience, across California.
Environmental, Water, & Land Use
Representation in water rights, environmental regulation, and land use for agricultural, public, and private clients, with attorneys in Fresno and Sacramento near the Capitol.
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