During these challenging times, Severson & Werson remains open and in full operation, consistent with the firm’s previously established contingency planning. While many of our attorneys and staff will be working remotely, as a firm, we continue in full operation. We are here to help, as always.


Mark D. Lonergan

Mark Lonergan commercial and financial litigation

Mark is a calm, seasoned trial lawyer whom clients trust with their most difficult litigation, including individual lawsuits and class actions, both in California and throughout the country.

Mr. Lonergan is an experienced commercial litigator and trial lawyer, emphasizing consumer class actions, financial institution litigation, and complex business disputes.

He has defended nationwide and state-wide class actions brought under a variety of state and federal consumer protection statutes, including the Truth-In-Lending Act, the Fair Debt Collection Practices Act (both California and Federal), the Fair Credit Reporting Act, the Telephone Consumer Protection Act, RESPA, HOEPA, California’s Consumer Legal Remedies Act, Unruh Act and the Unfair Competition Law, federal and state vehicle leasing acts, and numerous state-specific consumer finance statutes. He has defended hundreds of lawsuits alleging a violation of California’s UCL and similar unfair and deceptive acts and practices statutes in more than 20 other states. Mr. Lonergan has extensive trial experience, including both individual lawsuits and class actions.

Mr. Lonergan also has particular expertise in the areas of mortgage servicing and origination, automobile financing, leasing, lender liability claims, bankruptcy code violations, forced-placed insurance, dealer reserve litigation, bank operations issues, credit reporting, subprime and “predatory” lending claims, and insurance coverage disputes.

Mr. Lonergan is a member of the Association of Business Trial Lawyers and a frequent lecturer on consumer finance litigation.


  • University of Virginia, J.D., 1989
  • University of Virginia, B.A., 1984


  • California