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GlassRatner's Team

Bill Cosden

Executive Consultant

[email protected]

Main: (415) 839-9280 x 701

Mobile: (925) 360-4096

Fax: (213) 402-1304

Areas of Expertise

  • Fraud Investigation
  • Regulatory Consulting
  • Crisis Management
  • White Collar Crime
  • Intellectual Property
  • Internal Investigations


  • Energy
  • Telecom

Prominent Matters

  • People of the St. of California v. Rotten Robbie Oil Company, Lead Counsel in First Recovery for California State Superfund
  • Pacific Gas & Electric Company("PG&E") v. Lexington Insurance Co. et al, Managing In-House Counsel in action against 40 Insurance Carriers for Environmental Contamination Coverage
  • People of the State of California v. General Electric Company(“GE”) & George Messina, Lead Counsel in prosecution against GE and a Managing Director for Fraudulent Billing Practices


  • 2 Years with GlassRatner
  • 35 Years of Relevant Experience


  • School of Law, University of San Francisco-JD
  • University of California, Berkeley-BS Business Administration

Professional Designations

  • CIRA

William (“Bill”) Cosden joined GlassRatner in 2018 as an Executive Consultant in their San Francisco office. Bill comes to GlassRatner with expertise on matters involving complex dispute negotiation, litigation management, cross-border negotiations, environmental issues and governance. His international experience includes China, India and Vietnam. He has worked in a multitude of industries including financial services, technology, telecommunications, and energy. 

Prior to GlassRatner, Bill served as General Counsel and Corporate Counsel for several companies. He was the General Counsel at EM Capital Management, LLC, Silver Oak Partners, LLC, and Active Technologies, Inc.; the Director of Legal Affairs at; and Corporate Counsel for the Pacific, Gas & Electric Co.(“PG&E”). Bill also served as a Sr. Deputy District Attorney with the Alameda County (CA) District Attorney’s Office.  His responsibilities as Sr. Deputy Attorney involved civil and criminal white-collar crime, environmental enforcement, and prosecution of unlawful business practices under B&P Code §17200.

Bill is a past President of the Association of Corporate Counsel’s (“ACC”) San Francisco Bay Area Chapter, and a past Chair of ACC’s National Environmental Law Committee.  He also co-founded the Stanford Ecommerce Best Practices Conference, which is now in its 15th year.  

Bill received his J.D. degree from the University of San Francisco School of Law, and a B.S. in Business Administration from the University of California, Berkeley.

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