Mark B. Chassman

Practice Area: Commercial Litigation

Mark B. Chassman is an experienced litigation and trial lawyer who practices in the areas of complex business, commercial, and employment litigation in Federal and State courts. Mr. Chassman has extensive litigation experience in corporate, real estate, construction, products liability, contracts, employment, and general commercial litigation. On behalf of plaintiffs and defendants, Mr. Chassman has tried in excess of 60 jury and court trials. In addition, he has tried numerous cases in arbitrations.

Fellow to The Litigation Counsel of America, an invitation-only trial lawyer honorary society in which membership is limited to less than one-half of one-percent of American lawyers. Fellows are selected and invited into Fellowship after being evaluated for effectiveness and accomplishment in litigation and trial work, along with ethical reputation.


Loyola Law School. J.D.

California State University, Northridge. B.S. (Cum Laude)



District of Columbia

New York

Prior Experience

Prior to September 1993 when he founded Chassman & Seelig, LLP, Mr. Chassman was associated with the construction law firm of Monteleone & McCrory and the New York City law firms of Phillips, Nizer, Benjamin, Krim & Ballon and Rogers & Wells (now Clifford Chance). While associated with these international law firms, Mr. Chassman gained extensive business litigation and trial experience in Federal and State courts, principally on behalf of Fortune 500 companies.


Super Lawyers, Southern California Super Lawyers Magazine in Business Litigation/Employment & Labor/General Litigation.



Member, American Board of Trial Advocates (ABOTA)

Fellow to The Litigation Counsel of America.

Member, Multi-Million Dollar Advocates Forum and the Million Dollar Advocates Forum


“Termination for Convenience – Costs Recoverable,” The Construction Lawyer, Issue 7:3 at 3 (August 1987)